203231021320 has 32 divisors (see below), whose sum is σ = 484168023000. Its totient is φ = 76510501888.

The previous prime is 203231021311. The next prime is 203231021341. The reversal of 203231021320 is 23120132302.

It can be written as a sum of positive squares in 4 ways, for example, as 196208246116 + 7022775204 = 442954^2 + 83802^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149433895 + ... + 149435254.

Almost surely, 2^203231021320 is an apocalyptic number.

203231021320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203231021320 is an abundant number, since it is smaller than the sum of its proper divisors (280937001680).

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

203231021320 is a wasteful number, since it uses less digits than its factorization.

203231021320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298869177 (or 298869173 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 203231021320 its reverse (23120132302), we get a palindrome (226351153622).

The spelling of 203231021320 in words is "two hundred three billion, two hundred thirty-one million, twenty-one thousand, three hundred twenty".