22222212020221 has 4 divisors (see below), whose sum is σ = 22272832093600. Its totient is φ = 22171591946844.

The previous prime is 22222212020149. The next prime is 22222212020237. The reversal of 22222212020221 is 12202021222222.

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 22222212020221 - 2¹⁵ = 22222211987453 is a prime.

It is a super-2 number, since 2×22222212020221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22222212020192 and 22222212020201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222212000221) 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, 25310036031 + ... + 25310036908.

It is an arithmetic number, because the mean of its divisors is an integer number (5568208023400).

Almost surely, 2^{22222212020221} is an apocalyptic number.

It is an amenable number.

22222212020221 is a deficient number, since it is larger than the sum of its proper divisors (50620073379).

22222212020221 is an equidigital number, since it uses as much as digits as its factorization.

22222212020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50620073378.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 22222212020221 its reverse (12202021222222), we get a palindrome (34424233242443).

The spelling of 22222212020221 in words is "twenty-two trillion, two hundred twenty-two billion, two hundred twelve million, twenty thousand, two hundred twenty-one".