202200220200221 has 4 divisors (see below), whose sum is σ = 214094350800252. Its totient is φ = 190306089600192.

The previous prime is 202200220200211. The next prime is 202200220200247. The reversal of 202200220200221 is 122002022002202.

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 186503679523225 + 15696540676996 = 13656635^2 + 3961886^2 .

It is a cyclic number.

It is not a de Polignac number, because 202200220200221 - 2³⁴ = 202183040331037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 11894130600013 = 202200220200221 / (2 + 0 + 2 + 2 + 0 + 0 + 2 + 2 + 0 + 2 + 0 + 0 + 2 + 2 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 202200220200221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202200220200211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5947065299990 + ... + 5947065300023.

It is an arithmetic number, because the mean of its divisors is an integer number (53523587700063).

Almost surely, 2^{202200220200221} is an apocalyptic number.

It is an amenable number.

202200220200221 is a deficient number, since it is larger than the sum of its proper divisors (11894130600031).

202200220200221 is a wasteful number, since it uses less digits than its factorization.

202200220200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11894130600030.

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

Adding to 202200220200221 its reverse (122002022002202), we get a palindrome (324202242202423).

The spelling of 202200220200221 in words is "two hundred two trillion, two hundred billion, two hundred twenty million, two hundred thousand, two hundred twenty-one".