22221222020221 has 4 divisors (see below), whose sum is σ = 25395682308832. Its totient is φ = 19046761731612.

The previous prime is 22221222020177. The next prime is 22221222020227. The reversal of 22221222020221 is 12202022212222.

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 22221222020221 - 2⁷ = 22221222020093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22221222020192 and 22221222020201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221222020227) 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, 1587230144295 + ... + 1587230144308.

It is an arithmetic number, because the mean of its divisors is an integer number (6348920577208).

Almost surely, 2^{22221222020221} is an apocalyptic number.

It is an amenable number.

22221222020221 is a deficient number, since it is larger than the sum of its proper divisors (3174460288611).

22221222020221 is an equidigital number, since it uses as much as digits as its factorization.

22221222020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3174460288610.

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

Adding to 22221222020221 its reverse (12202022212222), we get a palindrome (34423244232443).

The spelling of 22221222020221 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred twenty-two million, twenty thousand, two hundred twenty-one".