22005443424221 has 4 divisors (see below), whose sum is σ = 22076200477344. Its totient is φ = 21934686371100.

The previous prime is 22005443424157. The next prime is 22005443424271. The reversal of 22005443424221 is 12242434450022.

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 22005443424221 - 2⁶ = 22005443424157 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 (22005443424271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35378526095 + ... + 35378526716.

It is an arithmetic number, because the mean of its divisors is an integer number (5519050119336).

Almost surely, 2^{22005443424221} is an apocalyptic number.

It is an amenable number.

22005443424221 is a deficient number, since it is larger than the sum of its proper divisors (70757053123).

22005443424221 is an equidigital number, since it uses as much as digits as its factorization.

22005443424221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70757053122.

The product of its (nonzero) digits is 122880, while the sum is 35.

Adding to 22005443424221 its reverse (12242434450022), we get a palindrome (34247877874243).

The spelling of 22005443424221 in words is "twenty-two trillion, five billion, four hundred forty-three million, four hundred twenty-four thousand, two hundred twenty-one".