Prismatotruncated icosiheptaheptacontadipeton

The prismatotruncated icosiheptaheptacontadipeton or potjak, also called the runcitruncated 221 polytope, is a convex uniform polypeton. It consists of 27 prismatotruncated triacontaditera, 27 small birhombated penteracts, 72 prismatotruncated hexatera, 216 small rhombated pentachoric prisms, and 720 triangular-hexagonal duoprismatic prisms. 2 prismatotruncated triacontaditera, 1 small birhombated penteract, 1 prismatotruncated hexateron, 1 small rhombated pentachoric prism, and 2 triangular-hexagonal duoprismatic prisms join at each vertex. As the name suggests, it is the runcitruncation of the icosiheptaheptacontadipeton.