Il numero romano MMDCCLXI nel sistema decimale vale: 2761.
MMDCCLXI in latino si scrive duo milia septingenti sexaginta unus,
mentre in italiano duemilasettecentosessantuno.
MMDCCXLII, MMDCCXLIII, MMDCCXLIV, MMDCCXLV, MMDCCXLVI, MMDCCXLVII, MMDCCXLVIII, MMDCCXLIX, MMDCCL, MMDCCLI, MMDCCLII, MMDCCLIII, MMDCCLIV, MMDCCLV, MMDCCLVI, MMDCCLVII, MMDCCLVIII, MMDCCLIX, MMDCCLX, MMDCCLXII, MMDCCLXIII, MMDCCLXIV, MMDCCLXV, MMDCCLXVI, MMDCCLXVII, MMDCCLXVIII, MMDCCLXIX, MMDCCLXX, MMDCCLXXI, MMDCCLXXII, MMDCCLXXIII, MMDCCLXXIV, MMDCCLXXV, MMDCCLXXVI, MMDCCLXXVII, MMDCCLXXVIII, MMDCCLXXIX, MMDCCLXXX