22390040506921 has 4 divisors (see below), whose sum is σ = 23112299878144. Its totient is φ = 21667781135700.

The previous prime is 22390040506919. The next prime is 22390040506949. The reversal of 22390040506921 is 12960504009322.

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 22390040506921 - 2¹ = 22390040506919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22390040506321) 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, 361129685565 + ... + 361129685626.

It is an arithmetic number, because the mean of its divisors is an integer number (5778074969536).

Almost surely, 2^{22390040506921} is an apocalyptic number.

It is an amenable number.

22390040506921 is a deficient number, since it is larger than the sum of its proper divisors (722259371223).

22390040506921 is an equidigital number, since it uses as much as digits as its factorization.

22390040506921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722259371222.

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 22390040506921 in words is "twenty-two trillion, three hundred ninety billion, forty million, five hundred six thousand, nine hundred twenty-one".