2131313113123 has 4 divisors (see below), whose sum is σ = 2132979504640. Its totient is φ = 2129646721608.

The previous prime is 2131313113109. The next prime is 2131313113141. The reversal of 2131313113123 is 3213113131312.

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

It is a cyclic number.

It is not a de Polignac number, because 2131313113123 - 2²⁵ = 2131279558691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131313116123) 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, 833193840 + ... + 833196397.

It is an arithmetic number, because the mean of its divisors is an integer number (533244876160).

Almost surely, 2^{2131313113123} is an apocalyptic number.

2131313113123 is a deficient number, since it is larger than the sum of its proper divisors (1666391517).

2131313113123 is a wasteful number, since it uses less digits than its factorization.

2131313113123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666391516.

The product of its digits is 972, while the sum is 25.

Adding to 2131313113123 its reverse (3213113131312), we get a palindrome (5344426244435).

The spelling of 2131313113123 in words is "two trillion, one hundred thirty-one billion, three hundred thirteen million, one hundred thirteen thousand, one hundred twenty-three".