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120-cell

In geometry, the 120-cell is the convex regular 4-polytope with Schläfli symbol {5,3,3}. It is also called a C₁₂₀, dodecaplex, hyperdodecahedron, polydodecahedron, hecatonicosachoron, dodecacontachoron and hecatonicosahedroid. Wikipedia
Cells: 120
Coxeter group: H4
Dual: 600-cell
Edges: 1200
Faces: 720
Petrie polygon: 30-gon
Vertex figure: tetrahedron