Prismatorhombated icosiheptaheptacontadipeton

The prismatorhombated icosiheptaheptacontadipeton or projak, also called the runcicantellated 221 polytope, is a convex uniform polypeton. It consists of 27 prismatorhombated triacontaditera, 27 great rhombated demipenteracts, 72 prismatorhombated hexatera, 216 great rhombated pentachoric prisms, and 720 triangular duoprismatic prisms. 2 prismatorhombated triacontaditera, 1 great rhombated demipenteract, 1 prismatorhombated hexateron, 2 great rhombated pentachoric prisms, and 1 triangular duoprismatic prism join at each vertex. As the name suggests, it is the runcicantellation of the icosiheptaheptacontadipeton.