Il numero romano MMDXXII nel sistema decimale vale: 2522.
MMDXXII in latino si scrive duo milia quingenti viginti duo,
mentre in italiano duemilacinquecentoventidue.
MMDIII, MMDIV, MMDV, MMDVI, MMDVII, MMDVIII, MMDIX, MMDX, MMDXI, MMDXII, MMDXIII, MMDXIV, MMDXV, MMDXVI, MMDXVII, MMDXVIII, MMDXIX, MMDXX, MMDXXI, MMDXXIII, MMDXXIV, MMDXXV, MMDXXVI, MMDXXVII, MMDXXVIII, MMDXXIX, MMDXXX, MMDXXXI, MMDXXXII, MMDXXXIII, MMDXXXIV, MMDXXXV, MMDXXXVI, MMDXXXVII, MMDXXXVIII, MMDXXXIX, MMDXL, MMDXLI