2131123113 has 12 divisors (see below), whose sum is σ = 3518044608. Its totient is φ = 1217784600.

The previous prime is 2131123109. The next prime is 2131123153. The reversal of 2131123113 is 3113211312.

It is not a de Polignac number, because 2131123113 - 2² = 2131123109 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2131123103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16913613 + ... + 16913738.

It is an arithmetic number, because the mean of its divisors is an integer number (293170384).

Almost surely, 2^2131123113 is an apocalyptic number.

It is an amenable number.

2131123113 is a deficient number, since it is larger than the sum of its proper divisors (1386921495).

2131123113 is a wasteful number, since it uses less digits than its factorization.

2131123113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33827364 (or 33827361 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 2131123113 is about 46164.0889978347. The cubic root of 2131123113 is about 1286.8744541315.

Adding to 2131123113 its reverse (3113211312), we get a palindrome (5244334425).

It can be divided in two parts, 213112 and 3113, that added together give a square (216225 = 465²).

The spelling of 2131123113 in words is "two billion, one hundred thirty-one million, one hundred twenty-three thousand, one hundred thirteen".