Il numero romano MMMCMLXI nel sistema decimale vale: 3961.
MMMCMLXI in latino si scrive tria milia nongenti sexaginta unus,
mentre in italiano tremilanovecentosessantuno.
MMMCMXLII, MMMCMXLIII, MMMCMXLIV, MMMCMXLV, MMMCMXLVI, MMMCMXLVII, MMMCMXLVIII, MMMCMXLIX, MMMCML, MMMCMLI, MMMCMLII, MMMCMLIII, MMMCMLIV, MMMCMLV, MMMCMLVI, MMMCMLVII, MMMCMLVIII, MMMCMLIX, MMMCMLX, MMMCMLXII, MMMCMLXIII, MMMCMLXIV, MMMCMLXV, MMMCMLXVI, MMMCMLXVII, MMMCMLXVIII, MMMCMLXIX, MMMCMLXX, MMMCMLXXI, MMMCMLXXII, MMMCMLXXIII, MMMCMLXXIV, MMMCMLXXV, MMMCMLXXVI, MMMCMLXXVII, MMMCMLXXVIII, MMMCMLXXIX, MMMCMLXXX