113131112111 has 2 divisors, whose sum is σ = 113131112112. Its totient is φ = 113131112110.

The previous prime is 113131112093. The next prime is 113131112167. The reversal of 113131112111 is 111211131311.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 113131112111 - 2²² = 113126917807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 113131112111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113131112411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56565556055 + 56565556056.

It is an arithmetic number, because the mean of its divisors is an integer number (56565556056).

Almost surely, 2^113131112111 is an apocalyptic number.

113131112111 is a deficient number, since it is larger than the sum of its proper divisors (1).

113131112111 is an equidigital number, since it uses as much as digits as its factorization.

113131112111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18, while the sum is 17.

Adding to 113131112111 its reverse (111211131311), we get a palindrome (224342243422).

The spelling of 113131112111 in words is "one hundred thirteen billion, one hundred thirty-one million, one hundred twelve thousand, one hundred eleven".