202221022221 has 24 divisors (see below), whose sum is σ = 300639705600. Its totient is φ = 130886987616.

The previous prime is 202221022217. The next prime is 202221022231. The reversal of 202221022221 is 122220122202.

202221022221 is a `hidden beast` number, since 202 + 221 + 0 + 22 + 221 = 666.

It is not a de Polignac number, because 202221022221 - 2² = 202221022217 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 202221022194 and 202221022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202221022231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 501621 + ... + 809978.

It is an arithmetic number, because the mean of its divisors is an integer number (12526654400).

Almost surely, 2^202221022221 is an apocalyptic number.

It is an amenable number.

202221022221 is a deficient number, since it is larger than the sum of its proper divisors (98418683379).

202221022221 is a wasteful number, since it uses less digits than its factorization.

202221022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312105 (or 1312102 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 202221022221 its reverse (122220122202), we get a palindrome (324441144423).

The spelling of 202221022221 in words is "two hundred two billion, two hundred twenty-one million, twenty-two thousand, two hundred twenty-one".