Demicellitruncated icosiheptaheptacontadipeton

The demicellitruncated icosiheptaheptacontadipeton or hictijik, also called the demisteritruncated 221 polytope, is a convex uniform polypeton. It consists of 27 prismatorhombated demipenteracts, 27 small prismated triacontaditera, 72 celliprismated hexatera, 216 small prismatodecachoric prisms, 216 prismatorhombated pentachoric prisms, and 720 triangular-hexagonal duoprismatic prisms. 1 prismatorhombated demipenteract, 1 small prismated triacontaditeron, 1 celliprismated hexateron, 1 small prismatodecachoric prism, 3 prismatorhombated pentachoric prisms, and 3 triangular-hexagonal duoprismatic prisms join at each vertex. As the name suggests, it is the demisteritruncation of the icosiheptaheptacontadipeton.