2013131123 has 4 divisors (see below), whose sum is σ = 2016745920. Its totient is φ = 2009516328.

The previous prime is 2013131117. The next prime is 2013131161. The reversal of 2013131123 is 3211313102.

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 2013131123 - 2²⁰ = 2012082547 is a prime.

It is a super-2 number, since 2×2013131123² = 8105393836782482258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2013131423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1806563 + ... + 1807676.

It is an arithmetic number, because the mean of its divisors is an integer number (504186480).

Almost surely, 2^2013131123 is an apocalyptic number.

2013131123 is a deficient number, since it is larger than the sum of its proper divisors (3614797).

2013131123 is an equidigital number, since it uses as much as digits as its factorization.

2013131123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3614796.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 2013131123 is about 44867.9297828638. The cubic root of 2013131123 is about 1262.6724003107.

Adding to 2013131123 its reverse (3211313102), we get a palindrome (5224444225).

The spelling of 2013131123 in words is "two billion, thirteen million, one hundred thirty-one thousand, one hundred twenty-three".