Il numero romano MCDLXI nel sistema decimale vale: 1461.
MCDLXI in latino si scrive mille quadringenti sexaginta unus,
mentre in italiano millequattrocentosessantuno.
MCDXLII, MCDXLIII, MCDXLIV, MCDXLV, MCDXLVI, MCDXLVII, MCDXLVIII, MCDXLIX, MCDL, MCDLI, MCDLII, MCDLIII, MCDLIV, MCDLV, MCDLVI, MCDLVII, MCDLVIII, MCDLIX, MCDLX, MCDLXII, MCDLXIII, MCDLXIV, MCDLXV, MCDLXVI, MCDLXVII, MCDLXVIII, MCDLXIX, MCDLXX, MCDLXXI, MCDLXXII, MCDLXXIII, MCDLXXIV, MCDLXXV, MCDLXXVI, MCDLXXVII, MCDLXXVIII, MCDLXXIX, MCDLXXX