22421500523221 has 4 divisors (see below), whose sum is σ = 22426750234944. Its totient is φ = 22416250811500.

The previous prime is 22421500523131. The next prime is 22421500523239. The reversal of 22421500523221 is 12232500512422.

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 22421500523221 - 2²⁷ = 22421366305493 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 (22421500526221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2624849455 + ... + 2624857996.

It is an arithmetic number, because the mean of its divisors is an integer number (5606687558736).

Almost surely, 2^{22421500523221} is an apocalyptic number.

It is an amenable number.

22421500523221 is a deficient number, since it is larger than the sum of its proper divisors (5249711723).

22421500523221 is an equidigital number, since it uses as much as digits as its factorization.

22421500523221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5249711722.

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 22421500523221 in words is "twenty-two trillion, four hundred twenty-one billion, five hundred million, five hundred twenty-three thousand, two hundred twenty-one".