22202423022221 has 4 divisors (see below), whose sum is σ = 23910301716252. Its totient is φ = 20494544328192.

The previous prime is 22202423022193. The next prime is 22202423022229. The reversal of 22202423022221 is 12222032420222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10234490341321 + 11967932680900 = 3199139^2 + 3459470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22202423022221 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 (22202423022229) 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, 853939346996 + ... + 853939347021.

It is an arithmetic number, because the mean of its divisors is an integer number (5977575429063).

Almost surely, 2^{22202423022221} is an apocalyptic number.

It is an amenable number.

22202423022221 is a deficient number, since it is larger than the sum of its proper divisors (1707878694031).

22202423022221 is a wasteful number, since it uses less digits than its factorization.

22202423022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707878694030.

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 22202423022221 its reverse (12222032420222), we get a palindrome (34424455442443).

The spelling of 22202423022221 in words is "twenty-two trillion, two hundred two billion, four hundred twenty-three million, twenty-two thousand, two hundred twenty-one".