200220020211221 has 4 divisors (see below), whose sum is σ = 202056901130700. Its totient is φ = 198383139291744.

The previous prime is 200220020211203. The next prime is 200220020211241. The reversal of 200220020211221 is 122112020022002.

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 57109306984900 + 143110713226321 = 7557070^2 + 11962889^2 .

It is a cyclic number.

It is not a de Polignac number, because 200220020211221 - 2²⁶ = 200219953102357 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 200220020211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200220020211241) 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, 918440459576 + ... + 918440459793.

It is an arithmetic number, because the mean of its divisors is an integer number (50514225282675).

Almost surely, 2^{200220020211221} is an apocalyptic number.

It is an amenable number.

200220020211221 is a deficient number, since it is larger than the sum of its proper divisors (1836880919479).

200220020211221 is a wasteful number, since it uses less digits than its factorization.

200220020211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836880919478.

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

Adding to 200220020211221 its reverse (122112020022002), we get a palindrome (322332040233223).

The spelling of 200220020211221 in words is "two hundred trillion, two hundred twenty billion, twenty million, two hundred eleven thousand, two hundred twenty-one".