22221210222221 has 8 divisors (see below), whose sum is σ = 22604243386560. Its totient is φ = 21839688037728.

The previous prime is 22221210222181. The next prime is 22221210222307. The reversal of 22221210222221 is 12222201212222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22221210222221 - 2⁶ = 22221210222157 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 (22221210222521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377715296 + ... + 377774121.

It is an arithmetic number, because the mean of its divisors is an integer number (2825530423320).

Almost surely, 2^{22221210222221} is an apocalyptic number.

It is an amenable number.

22221210222221 is a deficient number, since it is larger than the sum of its proper divisors (383033164339).

22221210222221 is an equidigital number, since it uses as much as digits as its factorization.

22221210222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755489923.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 22221210222221 its reverse (12222201212222), we get a palindrome (34443411434443).

Subtracting from 22221210222221 its reverse (12222201212222), we obtain a palindrome (9999009009999).

The spelling of 22221210222221 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred ten million, two hundred twenty-two thousand, two hundred twenty-one".