22110121221 has 4 divisors (see below), whose sum is σ = 29480161632. Its totient is φ = 14740080812.

The previous prime is 22110121219. The next prime is 22110121223. The reversal of 22110121221 is 12212101122.

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 an interprime number because it is at equal distance from previous prime (22110121219) and next prime (22110121223).

It is a cyclic number.

It is not a de Polignac number, because 22110121221 - 2¹ = 22110121219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22110121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22110121223) 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, 3685020201 + ... + 3685020206.

It is an arithmetic number, because the mean of its divisors is an integer number (7370040408).

Almost surely, 2^22110121221 is an apocalyptic number.

It is an amenable number.

22110121221 is a deficient number, since it is larger than the sum of its proper divisors (7370040411).

22110121221 is an equidigital number, since it uses as much as digits as its factorization.

22110121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7370040410.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22110121221 its reverse (12212101122), we get a palindrome (34322222343).

The spelling of 22110121221 in words is "twenty-two billion, one hundred ten million, one hundred twenty-one thousand, two hundred twenty-one".