22012212200021 has 4 divisors (see below), whose sum is σ = 22722283561344. Its totient is φ = 21302140838700.

The previous prime is 22012212199969. The next prime is 22012212200117. The reversal of 22012212200021 is 12000221221022.

It is a happy number.

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 22012212200021 - 2¹⁰ = 22012212198997 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 (22012212200221) 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, 355035680615 + ... + 355035680676.

It is an arithmetic number, because the mean of its divisors is an integer number (5680570890336).

Almost surely, 2^{22012212200021} is an apocalyptic number.

It is an amenable number.

22012212200021 is a deficient number, since it is larger than the sum of its proper divisors (710071361323).

22012212200021 is an equidigital number, since it uses as much as digits as its factorization.

22012212200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710071361322.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22012212200021 its reverse (12000221221022), we get a palindrome (34012433421043).

The spelling of 22012212200021 in words is "twenty-two trillion, twelve billion, two hundred twelve million, two hundred thousand, twenty-one".