Retroinverted hexacosihecatonicosachoron

The retroinverted hexacosihecatonicosachoron, or rixhi, is a nonconvex uniform polychoron that consists of 120 truncated dodecahedra and 600 octahedra. 5 octahedra and 10 truncated dodecahedra join at each vertex.

It is in the regiment of the rectified hexacosichoron.