202022220221 has 8 divisors (see below), whose sum is σ = 214252578360. Its totient is φ = 189830384128.

The previous prime is 202022220163. The next prime is 202022220247. The reversal of 202022220221 is 122022220202.

It can be written as a sum of positive squares in 4 ways, for example, as 16644612196 + 185377608025 = 129014^2 + 430555^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 202022220221 - 2⁶ = 202022220157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 202022220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202022220251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9619706 + ... + 9640683.

It is an arithmetic number, because the mean of its divisors is an integer number (26781572295).

Almost surely, 2^202022220221 is an apocalyptic number.

It is an amenable number.

202022220221 is a deficient number, since it is larger than the sum of its proper divisors (12230358139).

202022220221 is a wasteful number, since it uses less digits than its factorization.

202022220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19261023.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 202022220221 its reverse (122022220202), we get a palindrome (324044440423).

The spelling of 202022220221 in words is "two hundred two billion, twenty-two million, two hundred twenty thousand, two hundred twenty-one".