31000001012 has 12 divisors (see below), whose sum is σ = 54268865280. Its totient is φ = 15494610936.

The previous prime is 31000000951. The next prime is 31000001017. The reversal of 31000001012 is 21010000013.

It is a super-2 number, since 2×31000001012² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31000001017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1334438 + ... + 1357469.

It is an arithmetic number, because the mean of its divisors is an integer number (4522405440).

Almost surely, 2^31000001012 is an apocalyptic number.

It is an amenable number.

31000001012 is a deficient number, since it is larger than the sum of its proper divisors (23268864268).

31000001012 is a wasteful number, since it uses less digits than its factorization.

31000001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2694790 (or 2694788 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 8.

Adding to 31000001012 its reverse (21010000013), we get a palindrome (52010001025).

Subtracting from 31000001012 its reverse (21010000013), we obtain a palindrome (9990000999).

The spelling of 31000001012 in words is "thirty-one billion, one thousand, twelve".