2131113113 has 4 divisors (see below), whose sum is σ = 2139956148. Its totient is φ = 2122270080.

The previous prime is 2131113107. The next prime is 2131113119. The reversal of 2131113113 is 3113111312.

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

It is an interprime number because it is at equal distance from previous prime (2131113107) and next prime (2131113119).

It can be written as a sum of positive squares in 2 ways, for example, as 1651853449 + 479259664 = 40643^2 + 21892^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131113113 - 2¹⁶ = 2131047577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2131113091 and 2131113100.

It is not an unprimeable number, because it can be changed into a prime (2131113119) 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, 4421156 + ... + 4421637.

It is an arithmetic number, because the mean of its divisors is an integer number (534989037).

Almost surely, 2^2131113113 is an apocalyptic number.

It is an amenable number.

2131113113 is a deficient number, since it is larger than the sum of its proper divisors (8843035).

2131113113 is an equidigital number, since it uses as much as digits as its factorization.

2131113113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8843034.

The product of its digits is 54, while the sum is 17.

The square root of 2131113113 is about 46163.9806884112. The cubic root of 2131113113 is about 1286.8724413016.

Adding to 2131113113 its reverse (3113111312), we get a palindrome (5244224425).

The spelling of 2131113113 in words is "two billion, one hundred thirty-one million, one hundred thirteen thousand, one hundred thirteen".