22133665621 has 8 divisors (see below), whose sum is σ = 22964848920. Its totient is φ = 21307012608.

The previous prime is 22133665583. The next prime is 22133665633. The reversal of 22133665621 is 12656633122.

It can be written as a sum of positive squares in 4 ways, for example, as 197093521 + 21936572100 = 14039^2 + 148110^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22133665621 - 2¹⁵ = 22133632853 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 (22133665651) 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 7 ways as a sum of consecutive naturals, for example, 1122616 + ... + 1142161.

It is an arithmetic number, because the mean of its divisors is an integer number (2870606115).

Almost surely, 2^22133665621 is an apocalyptic number.

It is an amenable number.

22133665621 is a deficient number, since it is larger than the sum of its proper divisors (831183299).

22133665621 is a wasteful number, since it uses less digits than its factorization.

22133665621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2265143.

The product of its digits is 77760, while the sum is 37.

The spelling of 22133665621 in words is "twenty-two billion, one hundred thirty-three million, six hundred sixty-five thousand, six hundred twenty-one".