| genus c | 21, orientable |
| Schläfli formula c | {4,12} |
| V / F / E c | 20 / 60 / 120 |
| notes |
|
| vertex, face multiplicity c | 2, 1 |
| 24, each with 10 edges | |
| rotational symmetry group | 240 elements. |
| full symmetry group | 480 elements. |
| its presentation c | < r, s, t | t2, r4, (rs)2, (rt)2, (st)2, srs‑1rs‑1rs4 > |
| C&D number c | R21.4 |
| The statistics marked c are from the published work of Professor Marston Conder. | |
List of regular maps in orientable genus 21.
| Orientable | |
| Non-orientable |