31213133110 has 32 divisors (see below), whose sum is σ = 56410577280. Its totient is φ = 12434892288.

The previous prime is 31213133059. The next prime is 31213133111. The reversal of 31213133110 is 1133131213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213133111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4481811 + ... + 4488769.

It is an arithmetic number, because the mean of its divisors is an integer number (1762830540).

Almost surely, 2^31213133110 is an apocalyptic number.

31213133110 is a deficient number, since it is larger than the sum of its proper divisors (25197444170).

31213133110 is a wasteful number, since it uses less digits than its factorization.

31213133110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8712.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 31213133110 its reverse (1133131213), we get a palindrome (32346264323).

The spelling of 31213133110 in words is "thirty-one billion, two hundred thirteen million, one hundred thirty-three thousand, one hundred ten".