202255205221 has 4 divisors (see below), whose sum is σ = 214152570252. Its totient is φ = 190357840192.

The previous prime is 202255205197. The next prime is 202255205227. The reversal of 202255205221 is 122502552202.

It is a happy number.

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 82616004900 + 119639200321 = 287430^2 + 345889^2 .

It is a cyclic number.

It is not a de Polignac number, because 202255205221 - 2²⁹ = 201718334309 is a prime.

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 202255205221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202255205227) 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, 5948682490 + ... + 5948682523.

It is an arithmetic number, because the mean of its divisors is an integer number (53538142563).

Almost surely, 2^202255205221 is an apocalyptic number.

It is an amenable number.

202255205221 is a deficient number, since it is larger than the sum of its proper divisors (11897365031).

202255205221 is a wasteful number, since it uses less digits than its factorization.

202255205221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11897365030.

The product of its (nonzero) digits is 8000, while the sum is 28.

Adding to 202255205221 its reverse (122502552202), we get a palindrome (324757757423).

The spelling of 202255205221 in words is "two hundred two billion, two hundred fifty-five million, two hundred five thousand, two hundred twenty-one".