Number of selected skew morphism classes of C21 is 0
Total number of skew morphisms of C21 is 24
Total number of skew morphism classes of C21 is 9
Total number of automorphisms of C21 is 12

1. Skew morphsim class of size 1
     
     of order 1
     with kernel of order 21
     and smallest kernel generator 1
     and power function values [ 1 ]
     and with periodicity 1
     and with complexity 0
     and with auto-order 21
     φ | √φ | φ' | φ|<21>
   
   

2. Skew morphsim class of size 1
     
     of order 2
     with kernel of order 21
     and smallest kernel generator 1
     and power function values [ 1 ]
     and with periodicity 1
     and with complexity 1
     and with auto-order 2
     φ | √φ | φ' | φ2
   
   

3. Skew morphsim class of size 2
     
     of order 3
     with kernel of order 21
     and smallest kernel generator 1
     and power function values [ 1 ]
     and with periodicity 1
     and with complexity 1
     and with auto-order 3
     φ | √φ | φ' | φ3
   
   

4. Skew morphsim class of size 2
     
     of order 6
     with kernel of order 21
     and smallest kernel generator 1
     and power function values [ 1 ]
     and with periodicity 1
     and with complexity 1
     and with auto-order 6
     φ | √φ | φ' | φ6
   
   

5. Skew morphsim class of size 1
     
     of order 2
     with kernel of order 21
     and smallest kernel generator 1
     and power function values [ 1 ]
     and with periodicity 1
     and with complexity 1
     and with auto-order 2
     φ | √φ | φ' | φ2
   
   

6. Skew morphsim class of size 2
     
     of order 6
     with kernel of order 21
     and smallest kernel generator 1
     and power function values [ 1 ]
     and with periodicity 1
     and with complexity 1
     and with auto-order 6
     φ | √φ | φ' | φ6
   
   

7. Skew morphsim class of size 1
     
     of order 2
     with kernel of order 21
     and smallest kernel generator 1
     and power function values [ 1 ]
     and with periodicity 1
     and with complexity 1
     and with auto-order 2
     φ | √φ | φ' | φ2
   
   

8. Skew morphsim class of size 2
     
     of order 6
     with kernel of order 21
     and smallest kernel generator 1
     and power function values [ 1 ]
     and with periodicity 1
     and with complexity 1
     and with auto-order 6
     φ | √φ | φ' | φ6
   
   

9. Skew morphsim class of size 12
     
     of order 7
     with kernel of order 7
     and smallest kernel generator 3
     and power function values [ 1, 2, 4 ]
     and with periodicity 1
     and with complexity 2
     and with auto-order 3
     φ | √φ | φ' | φ|<3>