2131123122 has 24 divisors (see below), whose sum is σ = 4788450576. Its totient is φ = 710374212.

The previous prime is 2131123109. The next prime is 2131123153. The reversal of 2131123122 is 2213211312.

It is a super-2 number, since 2×2131123122² = 9083371522246053768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 2131123095 and 2131123104.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2192028 + ... + 2192999.

It is an arithmetic number, because the mean of its divisors is an integer number (199518774).

Almost surely, 2^2131123122 is an apocalyptic number.

2131123122 is an abundant number, since it is smaller than the sum of its proper divisors (2657327454).

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

2131123122 is an equidigital number, since it uses as much as digits as its factorization.

2131123122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4385044 (or 4385032 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 2131123122 is about 46164.0890953130. The cubic root of 2131123122 is about 1286.8744559430.

Adding to 2131123122 its reverse (2213211312), we get a palindrome (4344334434).

The spelling of 2131123122 in words is "two billion, one hundred thirty-one million, one hundred twenty-three thousand, one hundred twenty-two".