22102112221 has 4 divisors (see below), whose sum is σ = 25259556832. Its totient is φ = 18944667612.

The previous prime is 22102112209. The next prime is 22102112231. The reversal of 22102112221 is 12221120122.

It is a happy number.

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 22102112221 - 2¹⁵ = 22102079453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22102112195 and 22102112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22102112231) 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, 1578722295 + ... + 1578722308.

It is an arithmetic number, because the mean of its divisors is an integer number (6314889208).

Almost surely, 2^22102112221 is an apocalyptic number.

It is an amenable number.

22102112221 is a deficient number, since it is larger than the sum of its proper divisors (3157444611).

22102112221 is an equidigital number, since it uses as much as digits as its factorization.

22102112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3157444610.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22102112221 its reverse (12221120122), we get a palindrome (34323232343).

The spelling of 22102112221 in words is "twenty-two billion, one hundred two million, one hundred twelve thousand, two hundred twenty-one".