Small dipentary trishecatonicosachoron

The small dipentary trishecatonicosachoron, or sidipthi, is a nonconvex uniform polychoron that consists of 120 great icosahedra, 120 great dodecahedra, and 120 small dodecicosidodecahedra. 1 great icosahedron, 1 great dodecahedron, and 5 small dodecicosidodecahedra join at each vertex.

It is in the same regiment as the prismatodishecatonicosachoron.