Demitruncated icosiheptaheptacontadipeton

The demitruncated icosiheptaheptacontadipeton or hotjak, also called the demitruncated 221 polytope, is a convex uniform polypeton. It consists of 27 prismatotruncated demipenteracts, 27 rectified penteracts, 72 truncated hexatera, and 216 pentachoric prisms. 6 prismatotruncated demipenteracts, 1 rectified penteract, 1 truncated hexateron, and 1 pentachoric prism join at each vertex.