22221012012221 has 8 divisors (see below), whose sum is σ = 24241318611744. Its totient is φ = 20200741179120.

The previous prime is 22221012012181. The next prime is 22221012012229. The reversal of 22221012012221 is 12221021012222.

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 22221012012221 - 2³⁸ = 21946134105277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22221012012193 and 22221012012202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221012012229) 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, 7634246 + ... + 10135271.

It is an arithmetic number, because the mean of its divisors is an integer number (3030164826468).

Almost surely, 2^{22221012012221} is an apocalyptic number.

It is an amenable number.

22221012012221 is a deficient number, since it is larger than the sum of its proper divisors (2020306599523).

22221012012221 is a wasteful number, since it uses less digits than its factorization.

22221012012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17883211.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22221012012221 its reverse (12221021012222), we get a palindrome (34442033024443).

Subtracting from 22221012012221 its reverse (12221021012222), we obtain a palindrome (9999990999999).

The spelling of 22221012012221 in words is "twenty-two trillion, two hundred twenty-one billion, twelve million, twelve thousand, two hundred twenty-one".