22020122221 has 4 divisors (see below), whose sum is σ = 22024873600. Its totient is φ = 22015370844.

The previous prime is 22020122171. The next prime is 22020122239. The reversal of 22020122221 is 12222102022.

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 22020122221 - 2⁷ = 22020122093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22020122195 and 22020122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22020122251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2368731 + ... + 2378008.

It is an arithmetic number, because the mean of its divisors is an integer number (5506218400).

Almost surely, 2^22020122221 is an apocalyptic number.

It is an amenable number.

22020122221 is a deficient number, since it is larger than the sum of its proper divisors (4751379).

22020122221 is an equidigital number, since it uses as much as digits as its factorization.

22020122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4751378.

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

Adding to 22020122221 its reverse (12222102022), we get a palindrome (34242224243).

The spelling of 22020122221 in words is "twenty-two billion, twenty million, one hundred twenty-two thousand, two hundred twenty-one".