One and twenty-three hundredths.
You can change it from 123 to 123/1. This is just how to write it on the computer usually. Otherwise, it will be: 123 1
123 is already in decimal form.
You write it as 123.
123%
CXXIII
123
123 written as a product of prime factors is: 123 = 3 X 41.
Not sure about wrighting anything, but you could write it as 123*100 except that is NOT the exponential form.
One and twenty three hundredths = 1.23 As a percentage, that is 123%
123
ciento veintitrés
CXXIII