203120100200 has 48 divisors (see below), whose sum is σ = 475262295180. Its totient is φ = 80730524160.

The previous prime is 203120100199. The next prime is 203120100221. The reversal of 203120100200 is 2001021302.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 76781084836 + 126339015364 = 277094^2 + 355442^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3202997 + ... + 3265796.

Almost surely, 2^203120100200 is an apocalyptic number.

203120100200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203120100200 is an abundant number, since it is smaller than the sum of its proper divisors (272142194980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203120100200 is a wasteful number, since it uses less digits than its factorization.

203120100200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6468966 (or 6468957 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 203120100200 its reverse (2001021302), we get a palindrome (205121121502).

The spelling of 203120100200 in words is "two hundred three billion, one hundred twenty million, one hundred thousand, two hundred".