31021403012 has 12 divisors (see below), whose sum is σ = 54480651036. Its totient is φ = 15455502720.

The previous prime is 31021403009. The next prime is 31021403033. The reversal of 31021403012 is 21030412013.

It can be written as a sum of positive squares in 2 ways, for example, as 12865457476 + 18155945536 = 113426^2 + 134744^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13798433 + ... + 13800680.

It is an arithmetic number, because the mean of its divisors is an integer number (4540054253).

Almost surely, 2^31021403012 is an apocalyptic number.

It is an amenable number.

31021403012 is a deficient number, since it is larger than the sum of its proper divisors (23459248024).

31021403012 is a wasteful number, since it uses less digits than its factorization.

31021403012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27599398 (or 27599396 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31021403012 its reverse (21030412013), we get a palindrome (52051815025).

Subtracting from 31021403012 its reverse (21030412013), we obtain a palindrome (9990990999).

The spelling of 31021403012 in words is "thirty-one billion, twenty-one million, four hundred three thousand, twelve".