Invertifrustary pentishecatonicosidishexacosichoron

The invertifrustary pentishecatonicosidishexacosichoron, or ifophiddix, is a nonconvex uniform polychoron that consists of 120 dodecadodecahedra, 600 octahedra, 120 great dodecicosidodecahedra, 120 great icosicosidodecahedra, 120 small rhombidodecahedra, 120 quasitruncated dodecadodecahedra, and 600 truncated octahedra. One dodecadodecahedron, one octahedron, two great dodecicosidodecahedra, two great icosicosidodecahedra, two small rhombidodecahedra, four quasitruncated dodecadodecahedra, and four truncated octahedra join at each vertex.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the antifrustary hexacositrishecatonicosachoron.