31012130312 has 16 divisors (see below), whose sum is σ = 58198193340. Its totient is φ = 15492612096.

The previous prime is 31012130297. The next prime is 31012130321. The reversal of 31012130312 is 21303121013.

It can be written as a sum of positive squares in 2 ways, for example, as 30985152676 + 26977636 = 176026^2 + 5194^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1671833 + ... + 1690280.

Almost surely, 2^31012130312 is an apocalyptic number.

It is an amenable number.

31012130312 is a deficient number, since it is larger than the sum of its proper divisors (27186063028).

31012130312 is a wasteful number, since it uses less digits than its factorization.

31012130312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3363272 (or 3363268 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31012130312 its reverse (21303121013), we get a palindrome (52315251325).

The spelling of 31012130312 in words is "thirty-one billion, twelve million, one hundred thirty thousand, three hundred twelve".