31113013111 has 4 divisors (see below), whose sum is σ = 31506848800. Its totient is φ = 30719177424.

The previous prime is 31113013093. The next prime is 31113013147. The reversal of 31113013111 is 11131031113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31113013111 - 2⁵ = 31113013079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113013511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196917726 + ... + 196917883.

It is an arithmetic number, because the mean of its divisors is an integer number (7876712200).

Almost surely, 2^31113013111 is an apocalyptic number.

31113013111 is a deficient number, since it is larger than the sum of its proper divisors (393835689).

31113013111 is an equidigital number, since it uses as much as digits as its factorization.

31113013111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393835688.

The product of its (nonzero) digits is 27, while the sum is 16.

Adding to 31113013111 its reverse (11131031113), we get a palindrome (42244044224).

The spelling of 31113013111 in words is "thirty-one billion, one hundred thirteen million, thirteen thousand, one hundred eleven".