31131110212 has 12 divisors (see below), whose sum is σ = 55292569360. Its totient is φ = 15333233256.

The previous prime is 31131110207. The next prime is 31131110233. The reversal of 31131110212 is 21201113113.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58080162 + ... + 58080697.

Almost surely, 2^31131110212 is an apocalyptic number.

It is an amenable number.

31131110212 is a deficient number, since it is larger than the sum of its proper divisors (24161459148).

31131110212 is a wasteful number, since it uses less digits than its factorization.

31131110212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116160930 (or 116160928 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 31131110212 its reverse (21201113113), we get a palindrome (52332223325).

The spelling of 31131110212 in words is "thirty-one billion, one hundred thirty-one million, one hundred ten thousand, two hundred twelve".