Polytopes of Type {2,2,21,4}

This page is part of the Atlas of Small Regular Polytopes
(See Other Polytopes of Rank 5)

There are 2 polytopes of this type in this atlas. They are :
  1. {2,2,21,4}*672 (SmallGroup(672,1263)) (Universal)
  2. {2,2,21,4}*1344 (SmallGroup(1344,11701)) (Universal)