22126728148821 has 12 divisors (see below), whose sum is σ = 32437856855872. Its totient is φ = 14530985649576.

The previous prime is 22126728148769. The next prime is 22126728148829. The reversal of 22126728148821 is 12884182762122.

22126728148821 is a `hidden beast` number, since 2 + 2 + 1 + 2 + 67 + 2 + 81 + 488 + 21 = 666.

It is not a de Polignac number, because 22126728148821 - 2¹⁸ = 22126727886677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22126728148829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18347203501 + ... + 18347204706.

Almost surely, 2^{22126728148821} is an apocalyptic number.

It is an amenable number.

22126728148821 is a deficient number, since it is larger than the sum of its proper divisors (10311128707051).

22126728148821 is a wasteful number, since it uses less digits than its factorization.

22126728148821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36694408280 (or 36694408277 counting only the distinct ones).

The product of its digits is 2752512, while the sum is 54.

The spelling of 22126728148821 in words is "twenty-two trillion, one hundred twenty-six billion, seven hundred twenty-eight million, one hundred forty-eight thousand, eight hundred twenty-one".