Il numero romano MMMDLXI nel sistema decimale vale: 3561.
MMMDLXI in latino si scrive tria milia quingenti sexaginta unus,
mentre in italiano tremilacinquecentosessantuno.
MMMDXLII, MMMDXLIII, MMMDXLIV, MMMDXLV, MMMDXLVI, MMMDXLVII, MMMDXLVIII, MMMDXLIX, MMMDL, MMMDLI, MMMDLII, MMMDLIII, MMMDLIV, MMMDLV, MMMDLVI, MMMDLVII, MMMDLVIII, MMMDLIX, MMMDLX, MMMDLXII, MMMDLXIII, MMMDLXIV, MMMDLXV, MMMDLXVI, MMMDLXVII, MMMDLXVIII, MMMDLXIX, MMMDLXX, MMMDLXXI, MMMDLXXII, MMMDLXXIII, MMMDLXXIV, MMMDLXXV, MMMDLXXVI, MMMDLXXVII, MMMDLXXVIII, MMMDLXXIX, MMMDLXXX