112,200 or 112200
1200 = twelve hundred or one thousand and two hundred
One thousand, two hundred twelve.
You can write one hundred twelve thousand.
600,012,100
Twelve thousand, one hundred sixty-one.
One thousand, six hundred twelve and twelve hundredths.
You cannot have such a number as one thousand twelve hundred, as these two components would interfere with place values. One thousand would be written 1000, while twelve hundred would be written 1200.
One hundred twelve thousand, eight hundred seventy-two.
600,012,100
six and one thousand three hundred twelve hundred thousandths
1200.00 = one thousand two hundred (or twelve hundred)
1,200,012