Small invertipental trishecatonicosachoron

The small invertipental trishecatonicosachoron, or sipathi, is a nonconvex uniform polychoron that consists of 120 gikes, 120 dids, and 120 sidditdids.

It is in the regiment of the rectified great hecatonicosachoron.

It is superficially identical to the small intercepted invertipental trishecatonicosachoron, differing only internally.