113123131111 has 2 divisors, whose sum is σ = 113123131112. Its totient is φ = 113123131110.

The previous prime is 113123131103. The next prime is 113123131117. The reversal of 113123131111 is 111131321311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 113123131111 - 2³ = 113123131103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113123131117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56561565555 + 56561565556.

It is an arithmetic number, because the mean of its divisors is an integer number (56561565556).

Almost surely, 2^113123131111 is an apocalyptic number.

113123131111 is a deficient number, since it is larger than the sum of its proper divisors (1).

113123131111 is an equidigital number, since it uses as much as digits as its factorization.

113123131111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54, while the sum is 19.

Adding to 113123131111 its reverse (111131321311), we get a palindrome (224254452422).

The spelling of 113123131111 in words is "one hundred thirteen billion, one hundred twenty-three million, one hundred thirty-one thousand, one hundred eleven".