22111100221 has 8 divisors (see below), whose sum is σ = 25273786880. Its totient is φ = 18949403088.

The previous prime is 22111100213. The next prime is 22111100243. The reversal of 22111100221 is 12200111122.

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

It is not a de Polignac number, because 22111100221 - 2³ = 22111100213 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 (22111100251) 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, 198861 + ... + 289426.

It is an arithmetic number, because the mean of its divisors is an integer number (3159223360).

Almost surely, 2^22111100221 is an apocalyptic number.

It is an amenable number.

22111100221 is a deficient number, since it is larger than the sum of its proper divisors (3162686659).

22111100221 is an equidigital number, since it uses as much as digits as its factorization.

22111100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494763.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 22111100221 its reverse (12200111122), we get a palindrome (34311211343).

The spelling of 22111100221 in words is "twenty-two billion, one hundred eleven million, one hundred thousand, two hundred twenty-one".