22021202221021 has 4 divisors (see below), whose sum is σ = 22978645795872. Its totient is φ = 21063758646172.

The previous prime is 22021202221019. The next prime is 22021202221063. The reversal of 22021202221021 is 12012220212022.

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 22021202221021 - 2¹ = 22021202221019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22021202221021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021202222021) 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, 478721787391 + ... + 478721787436.

It is an arithmetic number, because the mean of its divisors is an integer number (5744661448968).

Almost surely, 2^{22021202221021} is an apocalyptic number.

It is an amenable number.

22021202221021 is a deficient number, since it is larger than the sum of its proper divisors (957443574851).

22021202221021 is an equidigital number, since it uses as much as digits as its factorization.

22021202221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957443574850.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 22021202221021 its reverse (12012220212022), we get a palindrome (34033422433043).

The spelling of 22021202221021 in words is "twenty-two trillion, twenty-one billion, two hundred two million, two hundred twenty-one thousand, twenty-one".