2131123110 has 32 divisors (see below), whose sum is σ = 5211203040. Its totient is φ = 557576448.

The previous prime is 2131123109. The next prime is 2131123153. The reversal of 2131123110 is 113211312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2131123110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 668575 + ... + 671754.

It is an arithmetic number, because the mean of its divisors is an integer number (162850095).

Almost surely, 2^2131123110 is an apocalyptic number.

2131123110 is an abundant number, since it is smaller than the sum of its proper divisors (3080079930).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2131123110 is a wasteful number, since it uses less digits than its factorization.

2131123110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340392.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 2131123110 is about 46164.0889653419. The cubic root of 2131123110 is about 1286.8744535276.

Adding to 2131123110 its reverse (113211312), we get a palindrome (2244334422).

The spelling of 2131123110 in words is "two billion, one hundred thirty-one million, one hundred twenty-three thousand, one hundred ten".