22000202221 has 4 divisors (see below), whose sum is σ = 22000937500. Its totient is φ = 21999466944.

The previous prime is 22000202113. The next prime is 22000202243. The reversal of 22000202221 is 12220200022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12220200022 = 2 ⋅6110100011.

It can be written as a sum of positive squares in 2 ways, for example, as 17602655625 + 4397546596 = 132675^2 + 66314^2 .

It is a cyclic number.

It is not a de Polignac number, because 22000202221 - 2⁹ = 22000201709 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 (22000202261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320766 + ... + 383263.

It is an arithmetic number, because the mean of its divisors is an integer number (5500234375).

Almost surely, 2^22000202221 is an apocalyptic number.

It is an amenable number.

22000202221 is a deficient number, since it is larger than the sum of its proper divisors (735279).

22000202221 is an equidigital number, since it uses as much as digits as its factorization.

22000202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735278.

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 22000202221 its reverse (12220200022), we get a palindrome (34220402243).

The spelling of 22000202221 in words is "twenty-two billion, two hundred two thousand, two hundred twenty-one".