2122131121 has 4 divisors (see below), whose sum is σ = 2315052144. Its totient is φ = 1929210100.

The previous prime is 2122131091. The next prime is 2122131127. The reversal of 2122131121 is 1211312212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2122131121 - 2⁷ = 2122130993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2122131095 and 2122131104.

It is not an unprimeable number, because it can be changed into a prime (2122131127) 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 3 ways as a sum of consecutive naturals, for example, 96460495 + ... + 96460516.

It is an arithmetic number, because the mean of its divisors is an integer number (578763036).

Almost surely, 2^2122131121 is an apocalyptic number.

It is an amenable number.

2122131121 is a deficient number, since it is larger than the sum of its proper divisors (192921023).

2122131121 is a wasteful number, since it uses less digits than its factorization.

2122131121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192921022.

The product of its digits is 48, while the sum is 16.

The square root of 2122131121 is about 46066.5944150422. The cubic root of 2122131121 is about 1285.0619703948.

Adding to 2122131121 its reverse (1211312212), we get a palindrome (3333443333).

The spelling of 2122131121 in words is "two billion, one hundred twenty-two million, one hundred thirty-one thousand, one hundred twenty-one".