Small small dipentary trishecatonicosachoron

The small small dipentary trishecatonicosachoron, or sisdipthi, is a mnonconvex uniform polychoron that consists of 120 icosahedra, 120 small stellated dodecahedra, and 120 small ditrigonal dodecicosidodecahedra. 1 icosahedron, 1 small stellated dodecahedron, and 5 small ditrigonal dodecicosidodecahedra join at each vertex.

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