113123420131 has 4 divisors (see below), whose sum is σ = 113124128832. Its totient is φ = 113122711432.

The previous prime is 113123420119. The next prime is 113123420171. The reversal of 113123420131 is 131024321311.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113123420131 is a prime.

It is a super-2 number, since 2×113123420131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113123420171) 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, 9870 + ... + 475756.

It is an arithmetic number, because the mean of its divisors is an integer number (28281032208).

Almost surely, 2^113123420131 is an apocalyptic number.

113123420131 is a deficient number, since it is larger than the sum of its proper divisors (708701).

113123420131 is an equidigital number, since it uses as much as digits as its factorization.

113123420131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708700.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 113123420131 its reverse (131024321311), we get a palindrome (244147741442).

The spelling of 113123420131 in words is "one hundred thirteen billion, one hundred twenty-three million, four hundred twenty thousand, one hundred thirty-one".