2123122156 has 12 divisors (see below), whose sum is σ = 3762495520. Its totient is φ = 1048123440.

The previous prime is 2123122097. The next prime is 2123122181. The reversal of 2123122156 is 6512213212.

It is a self number, because there is not a number n which added to its sum of digits gives 2123122156.

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 3 ways as a sum of consecutive naturals, for example, 3359055 + ... + 3359686.

Almost surely, 2^2123122156 is an apocalyptic number.

It is an amenable number.

2123122156 is a deficient number, since it is larger than the sum of its proper divisors (1639373364).

2123122156 is a wasteful number, since it uses less digits than its factorization.

2123122156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6718824 (or 6718822 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 2123122156 is about 46077.3497067702. The cubic root of 2123122156 is about 1285.2619805294.

Adding to 2123122156 its reverse (6512213212), we get a palindrome (8635335368).

The spelling of 2123122156 in words is "two billion, one hundred twenty-three million, one hundred twenty-two thousand, one hundred fifty-six".