31003140012 has 24 divisors (see below), whose sum is σ = 77905326576. Its totient is φ = 9539427648.

The previous prime is 31003139957. The next prime is 31003140037. The reversal of 31003140012 is 21004130013.

It is a super-2 number, since 2×31003140012² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31003139973 and 31003140000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99368883 + ... + 99369194.

It is an arithmetic number, because the mean of its divisors is an integer number (3246055274).

Almost surely, 2^31003140012 is an apocalyptic number.

It is an amenable number.

31003140012 is an abundant number, since it is smaller than the sum of its proper divisors (46902186564).

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

31003140012 is a wasteful number, since it uses less digits than its factorization.

31003140012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198738097 (or 198738095 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31003140012 its reverse (21004130013), we get a palindrome (52007270025).

Subtracting from 31003140012 its reverse (21004130013), we obtain a palindrome (9999009999).

The spelling of 31003140012 in words is "thirty-one billion, three million, one hundred forty thousand, twelve".