2131512122 has 16 divisors (see below), whose sum is σ = 3502080360. Its totient is φ = 968475648.

The previous prime is 2131512109. The next prime is 2131512133. The reversal of 2131512122 is 2212151312.

It can be written as a sum of positive squares in 4 ways, for example, as 1779236761 + 352275361 = 42181^2 + 18769^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2131512094 and 2131512103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1079903 + ... + 1081874.

Almost surely, 2^2131512122 is an apocalyptic number.

2131512122 is a deficient number, since it is larger than the sum of its proper divisors (1370568238).

2131512122 is a wasteful number, since it uses less digits than its factorization.

2131512122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161825.

The product of its digits is 240, while the sum is 20.

The square root of 2131512122 is about 46168.3021346898. The cubic root of 2131512122 is about 1286.9527501380.

Adding to 2131512122 its reverse (2212151312), we get a palindrome (4343663434).

The spelling of 2131512122 in words is "two billion, one hundred thirty-one million, five hundred twelve thousand, one hundred twenty-two".