2126322121 has 24 divisors (see below), whose sum is σ = 2715633216. Its totient is φ = 1646255520.

The previous prime is 2126322103. The next prime is 2126322131. The reversal of 2126322121 is 1212236212.

It is a happy number.

It is not a de Polignac number, because 2126322121 - 2⁹ = 2126321609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2126322092 and 2126322101.

It is not an unprimeable number, because it can be changed into a prime (2126322131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72060 + ... + 97186.

It is an arithmetic number, because the mean of its divisors is an integer number (113151384).

Almost surely, 2^2126322121 is an apocalyptic number.

It is an amenable number.

2126322121 is a deficient number, since it is larger than the sum of its proper divisors (589311095).

2126322121 is a wasteful number, since it uses less digits than its factorization.

2126322121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25309 (or 25302 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 2126322121 is about 46112.0604722886. The cubic root of 2126322121 is about 1285.9073710620.

Adding to 2126322121 its reverse (1212236212), we get a palindrome (3338558333).

The spelling of 2126322121 in words is "two billion, one hundred twenty-six million, three hundred twenty-two thousand, one hundred twenty-one".