Cellitruncated icosiheptaheptacontadipeton

The cellitruncated icosiheptaheptacontadipeton or catjak, also called the steritruncated 221 polytope, is a convex uniform polypeton. It consists of 27 truncated triacontaditera, 27 small prismated demipenteracts, 72 celliprismated hexatera, 216 pentachoric prisms, and 216 truncated pentachoric prisms. 1 truncated triacontaditeron, 1 small prismated demipenteract, 4 celliprismated hexatera, 1 pentachoric prism, and 4 truncated pentachoric prisms join at each vertex. As the name suggests, it is the steritruncation of the icosiheptaheptacontadipeton.