31021023112 has 16 divisors (see below), whose sum is σ = 58168385100. Its totient is φ = 15509453760.

The previous prime is 31021023091. The next prime is 31021023133. The reversal of 31021023112 is 21132012013.

It is an interprime number because it is at equal distance from previous prime (31021023091) and next prime (31021023133).

It can be written as a sum of positive squares in 2 ways, for example, as 30148765956 + 872257156 = 173634^2 + 29534^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214 + ... + 249082.

Almost surely, 2^31021023112 is an apocalyptic number.

It is an amenable number.

31021023112 is a deficient number, since it is larger than the sum of its proper divisors (27147361988).

31021023112 is a wasteful number, since it uses less digits than its factorization.

31021023112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264456 (or 264452 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31021023112 its reverse (21132012013), we get a palindrome (52153035125).

The spelling of 31021023112 in words is "thirty-one billion, twenty-one million, twenty-three thousand, one hundred twelve".