Il numero 421, quattrocentoventuno in Italiano, in Inglese si dice four hundred twenty-one.
Il numero ordinale 421° in inglese si dice four hundred twenty-first.
412: four hundred twelve
413: four hundred thirteen
414: four hundred fourteen
415: four hundred fifteen
416: four hundred sixteen
417: four hundred seventeen
418: four hundred eighteen
419: four hundred nineteen
420: four hundred twenty
422: four hundred twenty-two
423: four hundred twenty-three
424: four hundred twenty-four
425: four hundred twenty-five
426: four hundred twenty-six
427: four hundred twenty-seven
428: four hundred twenty-eight
429: four hundred twenty-nine
430: four hundred thirty