31000230012 has 48 divisors (see below), whose sum is σ = 73709344800. Its totient is φ = 10137788160.

The previous prime is 31000229971. The next prime is 31000230043. The reversal of 31000230012 is 21003200013.

It is a happy number.

It is a super-2 number, since 2×31000230012² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 31000230012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230314 + ... + 339182.

It is an arithmetic number, because the mean of its divisors is an integer number (1535611350).

Almost surely, 2^31000230012 is an apocalyptic number.

It is an amenable number.

31000230012 is an abundant number, since it is smaller than the sum of its proper divisors (42709114788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31000230012 is a wasteful number, since it uses less digits than its factorization.

31000230012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109326 (or 109324 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 31000230012 its reverse (21003200013), we get a palindrome (52003430025).

The spelling of 31000230012 in words is "thirty-one billion, two hundred thirty thousand, twelve".