Invertipental hexacosidishecatonicosachoron

The invertopental hexacosidishecatonicosachoron, or ipixady, is a nonconvex uniform polychoron that consists of 120 great dodecahedra, 120 small dodecicosidodecahedra, and 600 octahedra.

It is in the regiment of the rectified hexacosichoron.