Il numero romano MMMCLXI nel sistema decimale vale: 3161.
MMMCLXI in latino si scrive tria milia centum sexaginta unus,
mentre in italiano tremilacentosessantuno.
MMMCXLII, MMMCXLIII, MMMCXLIV, MMMCXLV, MMMCXLVI, MMMCXLVII, MMMCXLVIII, MMMCXLIX, MMMCL, MMMCLI, MMMCLII, MMMCLIII, MMMCLIV, MMMCLV, MMMCLVI, MMMCLVII, MMMCLVIII, MMMCLIX, MMMCLX, MMMCLXII, MMMCLXIII, MMMCLXIV, MMMCLXV, MMMCLXVI, MMMCLXVII, MMMCLXVIII, MMMCLXIX, MMMCLXX, MMMCLXXI, MMMCLXXII, MMMCLXXIII, MMMCLXXIV, MMMCLXXV, MMMCLXXVI, MMMCLXXVII, MMMCLXXVIII, MMMCLXXIX, MMMCLXXX