22222002220221 has 4 divisors (see below), whose sum is σ = 29629336293632. Its totient is φ = 14814668146812.

The previous prime is 22222002220181. The next prime is 22222002220259. The reversal of 22222002220221 is 12202220022222.

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 not a de Polignac number, because 22222002220221 - 2⁹ = 22222002219709 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 (22222002220721) 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, 3703667036701 + ... + 3703667036706.

It is an arithmetic number, because the mean of its divisors is an integer number (7407334073408).

Almost surely, 2^{22222002220221} is an apocalyptic number.

It is an amenable number.

22222002220221 is a deficient number, since it is larger than the sum of its proper divisors (7407334073411).

22222002220221 is an equidigital number, since it uses as much as digits as its factorization.

22222002220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7407334073410.

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 22222002220221 its reverse (12202220022222), we get a palindrome (34424222242443).

The spelling of 22222002220221 in words is "twenty-two trillion, two hundred twenty-two billion, two million, two hundred twenty thousand, two hundred twenty-one".