21700 may refer to:
21,700 (number) 21700 (year)
Places 21700 Caseynicole (1999 RD72), a Mars-crossing asteroid, the 21700th asteroid registered Jalapa, Baja California, Mexico (postal code: 21700) Lice, Turkey (postal code: 21700) La Palma del Condado (postal code: 21700), Huevla, Spain 21700. a postal code in Côte-d'Or, Bourgogne-Franche-Comté, France; used for several communes, see Communes of the Côte-d'Or department
Other uses 21700 battery, a cylindrical battery cell form factor for rechargeable lithium-ion batteries U+2170x (Unicode character block), see List of CJK Unified Ideographs Extension B (Part 2 of 7)
See also
2170 (disambiguation) 217 (number) 217 (ISO year +217; A.D. 217 / 217 CE)