202022102221 has 4 divisors (see below), whose sum is σ = 202102240444. Its totient is φ = 201941964000.

The previous prime is 202022102143. The next prime is 202022102257. The reversal of 202022102221 is 122201220202.

202022102221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12697909225 + 189324192996 = 112685^2 + 435114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202022102221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202022102195 and 202022102204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202022102021) 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, 40065330 + ... + 40070371.

It is an arithmetic number, because the mean of its divisors is an integer number (50525560111).

Almost surely, 2^202022102221 is an apocalyptic number.

It is an amenable number.

202022102221 is a deficient number, since it is larger than the sum of its proper divisors (80138223).

202022102221 is an equidigital number, since it uses as much as digits as its factorization.

202022102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80138222.

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

Adding to 202022102221 its reverse (122201220202), we get a palindrome (324223322423).

The spelling of 202022102221 in words is "two hundred two billion, twenty-two million, one hundred two thousand, two hundred twenty-one".