113131243129 has 4 divisors (see below), whose sum is σ = 113131941876. Its totient is φ = 113130544384.

The previous prime is 113131243087. The next prime is 113131243157. The reversal of 113131243129 is 921342131311.

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 can be written as a sum of positive squares in 2 ways, for example, as 43566125625 + 69565117504 = 208725^2 + 263752^2 .

It is a cyclic number.

It is not a de Polignac number, because 113131243129 - 2²³ = 113122854521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 113131243129.

It is not an unprimeable number, because it can be changed into a prime (113131243229) 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, 32937 + ... + 476809.

It is an arithmetic number, because the mean of its divisors is an integer number (28282985469).

Almost surely, 2^113131243129 is an apocalyptic number.

It is an amenable number.

113131243129 is a deficient number, since it is larger than the sum of its proper divisors (698747).

113131243129 is an equidigital number, since it uses as much as digits as its factorization.

113131243129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698746.

The product of its digits is 3888, while the sum is 31.

The spelling of 113131243129 in words is "one hundred thirteen billion, one hundred thirty-one million, two hundred forty-three thousand, one hundred twenty-nine".