12103203231 has 12 divisors (see below), whose sum is σ = 19979891152. Its totient is φ = 6916116096.

The previous prime is 12103203199. The next prime is 12103203269. The reversal of 12103203231 is 13230230121.

12103203231 is a `hidden beast` number, since 1 + 21 + 0 + 320 + 323 + 1 = 666.

It is not a de Polignac number, because 12103203231 - 2⁵ = 12103203199 is a prime.

It is a super-2 number, since 2×12103203231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12103203271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96057106 + ... + 96057231.

Almost surely, 2^12103203231 is an apocalyptic number.

12103203231 is a deficient number, since it is larger than the sum of its proper divisors (7876687921).

12103203231 is a wasteful number, since it uses less digits than its factorization.

12103203231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192114350 (or 192114347 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 12103203231 its reverse (13230230121), we get a palindrome (25333433352).

The spelling of 12103203231 in words is "twelve billion, one hundred three million, two hundred three thousand, two hundred thirty-one".