Il numero 821, ottocentoventuno in Italiano, in Inglese si dice eight hundred twenty-one.
Il numero ordinale 821° in inglese si dice eight hundred twenty-first.
812: eight hundred twelve
813: eight hundred thirteen
814: eight hundred fourteen
815: eight hundred fifteen
816: eight hundred sixteen
817: eight hundred seventeen
818: eight hundred eighteen
819: eight hundred nineteen
820: eight hundred twenty
822: eight hundred twenty-two
823: eight hundred twenty-three
824: eight hundred twenty-four
825: eight hundred twenty-five
826: eight hundred twenty-six
827: eight hundred twenty-seven
828: eight hundred twenty-eight
829: eight hundred twenty-nine
830: eight hundred thirty