Il numero romano MDCXXII nel sistema decimale vale: 1622.
MDCXXII in latino si scrive mille sescenti viginti duo,
mentre in italiano milleseicentoventidue.
MDCIII, MDCIV, MDCV, MDCVI, MDCVII, MDCVIII, MDCIX, MDCX, MDCXI, MDCXII, MDCXIII, MDCXIV, MDCXV, MDCXVI, MDCXVII, MDCXVIII, MDCXIX, MDCXX, MDCXXI, MDCXXIII, MDCXXIV, MDCXXV, MDCXXVI, MDCXXVII, MDCXXVIII, MDCXXIX, MDCXXX, MDCXXXI, MDCXXXII, MDCXXXIII, MDCXXXIV, MDCXXXV, MDCXXXVI, MDCXXXVII, MDCXXXVIII, MDCXXXIX, MDCXL, MDCXLI