Small rhombated icosiheptaheptacontadipeton

The small rhombated icosiheptaheptacontadipeton or sirjak, also called the cantellated 221 polytope, is a convex uniform polypeton. It consists of 27 small rhombated triacontaditera, 27 penteractitriacontaditera, 72 small rhombated hexatera, and 216 rectified pentachoric prisms. 3 small rhombated triacontaditera, 1 penteractitriacontaditeron, 2 small rhombated hexatera, and 2 rectified pentachoric prisms join at each vertex. As the name suggests, it is the cantellation of the icosiheptaheptacontadipeton.

The small rhombated icosiheptaheptacontadipeton contains the vertices and edges of the celligreatorhombated hexateric prism.