Small invertifrustary pentishecatonicosihexacosichoron

The small invertifrustary pentishecatonicosihexacosichoron, or sifophix, is a nonconvex uniform polychoron that consists of 120 dodecadodecahedra, 600 octahedra, 120 great dodecicosidodecahedra, 120 great icosicosidodecahedra, 120 small dodecicosahedra, and 120 icosidodecatruncated icosidodecahedra. One dodecadodecahedron, one octahedron, two great dodecicosidodecahedra, two great icosicosidodecahedra, two small dodecicosahedra, and four icosidodecatruncated icosidodecahedra join at each vertex.

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