It is 4200.
12,300
Twelve million three hundred thousand forty in digits is 12,003,040
Three hundred twelve thousand, five hundred.
One million, two hundred thousand, two hundred three.
Three hundred thousand, six hundred and twelve.
500,000,302,000
Twelve million, five hundred thousand, three hundred.
six and one thousand three hundred twelve hundred thousandths
516,312,000
63,412
8,000,012,300
Three hundred twelve thousand, eight hundred nineteen