31011322312 has 8 divisors (see below), whose sum is σ = 58146229350. Its totient is φ = 15505661152.

The previous prime is 31011322301. The next prime is 31011322351. The reversal of 31011322312 is 21322311013.

It can be written as a sum of positive squares in only one way, i.e., 21899856196 + 9111466116 = 147986^2 + 95454^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×31011322312² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31011322312.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1938207637 + ... + 1938207652.

Almost surely, 2^31011322312 is an apocalyptic number.

It is an amenable number.

31011322312 is a deficient number, since it is larger than the sum of its proper divisors (27134907038).

31011322312 is a wasteful number, since it uses less digits than its factorization.

31011322312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3876415295 (or 3876415291 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31011322312 its reverse (21322311013), we get a palindrome (52333633325).

The spelling of 31011322312 in words is "thirty-one billion, eleven million, three hundred twenty-two thousand, three hundred twelve".