200021102221 has 4 divisors (see below), whose sum is σ = 200029751100. Its totient is φ = 200012453344.

The previous prime is 200021102173. The next prime is 200021102287. The reversal of 200021102221 is 122201120002.

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 34917033321 + 165104068900 = 186861^2 + 406330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200021102221 is a prime.

It is a super-2 number, since 2×200021102221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200021102291) 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, 4289656 + ... + 4336033.

It is an arithmetic number, because the mean of its divisors is an integer number (50007437775).

Almost surely, 2^200021102221 is an apocalyptic number.

It is an amenable number.

200021102221 is a deficient number, since it is larger than the sum of its proper divisors (8648879).

200021102221 is an equidigital number, since it uses as much as digits as its factorization.

200021102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8648878.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 200021102221 its reverse (122201120002), we get a palindrome (322222222223).

The spelling of 200021102221 in words is "two hundred billion, twenty-one million, one hundred two thousand, two hundred twenty-one".