Dischiliahecatonhexaconta-myriaheptachiliadiacosioctaconta-zetton

The dischiliahecatonhexaconta-myriaheptachiliadiacosioctaconta-zetton, abbreviated as 2160-17280-zetton, also known as fy, the E8 polytope, or the 421 polytope, is a semiregular polyzetton. It's made out of 17280 octaexa and 2160 hecatonicosoctaexa.

The dischiliahecatonhexaconta-myriaheptachiliadiacosioctaconta-zetton contains the vertices and edges of the birectified enneazetton, small exioctadecazetton, hemiocteract, rectified diacosipentacontahexazetton, hecatonicosihexapentacosiheptacontahexaexic prism, triangular-icosiheptaheptacontidipetic duoprism, pentachoric-rectified pentachoric duoprism, tetrahedral-demipenteractic duoprism, hexadecachoric duoprism, octahedral-triacontiditeric duoprism, square-hexacontatetrapetic duoprism, rectified octaexic prism, and triangular-hexateric duoprismatic prism.

Coordinates
Coordinates for a 2160-17280-zetton with edge length 2$\sqrt{25/32}$ are given by all permutations and sign changes of as well as all even sign changes of
 * (±2, ±2, 0, 0, 0, 0, 0, 0),
 * (±1, ±1, ±1, ±1, ±1, ±1, ±1, ±1).