Great demirhombated icosiheptaheptacontadipeton

The great demirhombated icosiheptaheptacontadipeton or ghorjak, also called the demicantitruncated 221 polytope, is a convex uniform polypeton. It consists of 27 great prismated demipenteracts, 27 bitruncated penteracts, 72 great rhombated hexatera, and 216 truncated pentachoric prisms. 3 great prismated demipenteracts, 1 bitruncated penteract, 1 great rhombated hexateron, and 1 truncated pentachoric prism join at each vertex. As the name suggests, it is the demicantitruncation of the icosiheptaheptacontadipeton.