| genus c | 21, orientable |
| Schläfli formula c | {8,16} |
| V / F / E c | 8 / 16 / 64 |
| notes |
|
| vertex, face multiplicity c | 8, 2 |
| 8, each with 16 edges | |
| rotational symmetry group | 128 elements. |
| full symmetry group | 256 elements. |
| its presentation c | < r, s, t | t2, (rs)2, (rt)2, (st)2, r8, (rs‑1r2)2, s‑1rs‑1r2s‑1rs‑1, s3rs‑1rs4 > |
| C&D number c | R21.25 |
| The statistics marked c are from the published work of Professor Marston Conder. | |
It can be 3-split to give
List of regular maps in orientable genus 21.
| Orientable | |
| Non-orientable |