22120002002221 has 4 divisors (see below), whose sum is σ = 22120018813600. Its totient is φ = 22119985190844.

The previous prime is 22120002002213. The next prime is 22120002002227. The reversal of 22120002002221 is 12220020002122.

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 22120002002221 - 2³ = 22120002002213 is a prime.

It is a super-2 number, since 2×22120002002221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22120002002195 and 22120002002204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120002002227) 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, 6247281 + ... + 9125158.

It is an arithmetic number, because the mean of its divisors is an integer number (5530004703400).

Almost surely, 2^{22120002002221} is an apocalyptic number.

It is an amenable number.

22120002002221 is a deficient number, since it is larger than the sum of its proper divisors (16811379).

22120002002221 is a wasteful number, since it uses less digits than its factorization.

22120002002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16811378.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 22120002002221 its reverse (12220020002122), we get a palindrome (34340022004343).

The spelling of 22120002002221 in words is "twenty-two trillion, one hundred twenty billion, two million, two thousand, two hundred twenty-one".