31223011203 has 12 divisors (see below), whose sum is σ = 45168143488. Its totient is φ = 20783846160.

The previous prime is 31223011199. The next prime is 31223011229. The reversal of 31223011203 is 30211032213.

31223011203 is a `hidden beast` number, since 312 + 230 + 1 + 120 + 3 = 666.

It is not a de Polignac number, because 31223011203 - 2² = 31223011199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31223011003) 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, 2618275 + ... + 2630172.

Almost surely, 2^31223011203 is an apocalyptic number.

31223011203 is a deficient number, since it is larger than the sum of its proper divisors (13945132285).

31223011203 is a wasteful number, since it uses less digits than its factorization.

31223011203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5249114 (or 5249111 counting only the distinct ones).

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

Adding to 31223011203 its reverse (30211032213), we get a palindrome (61434043416).

The spelling of 31223011203 in words is "thirty-one billion, two hundred twenty-three million, eleven thousand, two hundred three".