202221102221 has 4 divisors (see below), whose sum is σ = 206523678912. Its totient is φ = 197918525532.

The previous prime is 202221102199. The next prime is 202221102247. The reversal of 202221102221 is 122201122202.

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 202221102221 - 2³⁰ = 201147360397 is a prime.

It is a super-2 number, since 2×202221102221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202221102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202221102521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2151288275 + ... + 2151288368.

It is an arithmetic number, because the mean of its divisors is an integer number (51630919728).

Almost surely, 2^202221102221 is an apocalyptic number.

It is an amenable number.

202221102221 is a deficient number, since it is larger than the sum of its proper divisors (4302576691).

202221102221 is an equidigital number, since it uses as much as digits as its factorization.

202221102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4302576690.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 202221102221 its reverse (122201122202), we get a palindrome (324422224423).

The spelling of 202221102221 in words is "two hundred two billion, two hundred twenty-one million, one hundred two thousand, two hundred twenty-one".