Part of the
Atlas of Small Regular Polytopes
Polytopes of Type {2,6,21}
See
other polytopes
of rank 4
Polytopes of this Type
3 in this atlas
{2,6,21}*504
·SmallGroup(504,192) · universal
{2,6,21}*672
·SmallGroup(672,1260) · universal
{2,6,21}*1512
·SmallGroup(1512,561) · universal