Il numero romano MDLXXI nel sistema decimale vale: 1571.
MDLXXI in latino si scrive mille quingenti septuaginta unus,
mentre in italiano millecinquecentosettantuno.
MDLII, MDLIII, MDLIV, MDLV, MDLVI, MDLVII, MDLVIII, MDLIX, MDLX, MDLXI, MDLXII, MDLXIII, MDLXIV, MDLXV, MDLXVI, MDLXVII, MDLXVIII, MDLXIX, MDLXX, MDLXXII, MDLXXIII, MDLXXIV, MDLXXV, MDLXXVI, MDLXXVII, MDLXXVIII, MDLXXIX, MDLXXX, MDLXXXI, MDLXXXII, MDLXXXIII, MDLXXXIV, MDLXXXV, MDLXXXVI, MDLXXXVII, MDLXXXVIII, MDLXXXIX, MDXC