Il numero romano MCCCLI nel sistema decimale vale: 1351.
MCCCLI in latino si scrive mille trecenti quinquaginta unus,
mentre in italiano milletrecentocinquantuno.
MCCCXXXII, MCCCXXXIII, MCCCXXXIV, MCCCXXXV, MCCCXXXVI, MCCCXXXVII, MCCCXXXVIII, MCCCXXXIX, MCCCXL, MCCCXLI, MCCCXLII, MCCCXLIII, MCCCXLIV, MCCCXLV, MCCCXLVI, MCCCXLVII, MCCCXLVIII, MCCCXLIX, MCCCL, MCCCLII, MCCCLIII, MCCCLIV, MCCCLV, MCCCLVI, MCCCLVII, MCCCLVIII, MCCCLIX, MCCCLX, MCCCLXI, MCCCLXII, MCCCLXIII, MCCCLXIV, MCCCLXV, MCCCLXVI, MCCCLXVII, MCCCLXVIII, MCCCLXIX, MCCCLXX