Il numero romano CLXXI nel sistema decimale vale: 171.
CLXXI in latino si scrive centum septuaginta unus,
mentre in italiano centosettantuno.
CLII, CLIII, CLIV, CLV, CLVI, CLVII, CLVIII, CLIX, CLX, CLXI, CLXII, CLXIII, CLXIV, CLXV, CLXVI, CLXVII, CLXVIII, CLXIX, CLXX, CLXXII, CLXXIII, CLXXIV, CLXXV, CLXXVI, CLXXVII, CLXXVIII, CLXXIX, CLXXX, CLXXXI, CLXXXII, CLXXXIII, CLXXXIV, CLXXXV, CLXXXVI, CLXXXVII, CLXXXVIII, CLXXXIX, CXC