31213022113 has 16 divisors (see below), whose sum is σ = 38420315136. Its totient is φ = 24693261120.

The previous prime is 31213022083. The next prime is 31213022129. The reversal of 31213022113 is 31122031213.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31213022113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31213022153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1289583 + ... + 1313563.

It is an arithmetic number, because the mean of its divisors is an integer number (2401269696).

Almost surely, 2^31213022113 is an apocalyptic number.

It is an amenable number.

31213022113 is a deficient number, since it is larger than the sum of its proper divisors (7207293023).

31213022113 is a wasteful number, since it uses less digits than its factorization.

31213022113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38304.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31213022113 its reverse (31122031213), we get a palindrome (62335053326).

The spelling of 31213022113 in words is "thirty-one billion, two hundred thirteen million, twenty-two thousand, one hundred thirteen".