22120010221 has 4 divisors (see below), whose sum is σ = 22120491744. Its totient is φ = 22119528700.

The previous prime is 22120010219. The next prime is 22120010257. The reversal of 22120010221 is 12201002122.

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 22120010221 - 2¹ = 22120010219 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 (22120017221) 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, 163615 + ... + 266476.

It is an arithmetic number, because the mean of its divisors is an integer number (5530122936).

Almost surely, 2^22120010221 is an apocalyptic number.

It is an amenable number.

22120010221 is a deficient number, since it is larger than the sum of its proper divisors (481523).

22120010221 is an equidigital number, since it uses as much as digits as its factorization.

22120010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481522.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22120010221 its reverse (12201002122), we get a palindrome (34321012343).

The spelling of 22120010221 in words is "twenty-two billion, one hundred twenty million, ten thousand, two hundred twenty-one".