Il numero romano MMMDCCCI nel sistema decimale vale: 3801.
MMMDCCCI in latino si scrive tria milia octingenti unus,
mentre in italiano tremilaottocentouno.
MMMDCCLXXXII, MMMDCCLXXXIII, MMMDCCLXXXIV, MMMDCCLXXXV, MMMDCCLXXXVI, MMMDCCLXXXVII, MMMDCCLXXXVIII, MMMDCCLXXXIX, MMMDCCXC, MMMDCCXCI, MMMDCCXCII, MMMDCCXCIII, MMMDCCXCIV, MMMDCCXCV, MMMDCCXCVI, MMMDCCXCVII, MMMDCCXCVIII, MMMDCCXCIX, MMMDCCC, MMMDCCCII, MMMDCCCIII, MMMDCCCIV, MMMDCCCV, MMMDCCCVI, MMMDCCCVII, MMMDCCCVIII, MMMDCCCIX, MMMDCCCX, MMMDCCCXI, MMMDCCCXII, MMMDCCCXIII, MMMDCCCXIV, MMMDCCCXV, MMMDCCCXVI, MMMDCCCXVII, MMMDCCCXVIII, MMMDCCCXIX, MMMDCCCXX