200100221 has 4 divisors (see below), whose sum is σ = 200155200. Its totient is φ = 200045244.

The previous prime is 200100209. The next prime is 200100247. The reversal of 200100221 is 122001002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 200100221 - 2⁶ = 200100157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200100199 and 200100208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200108221) 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, 21611 + ... + 29448.

It is an arithmetic number, because the mean of its divisors is an integer number (50038800).

Almost surely, 2^200100221 is an apocalyptic number.

It is an amenable number.

200100221 is a deficient number, since it is larger than the sum of its proper divisors (54979).

200100221 is an equidigital number, since it uses as much as digits as its factorization.

200100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54978.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 200100221 is about 14145.6785273807. The cubic root of 200100221 is about 584.9012139913.

Adding to 200100221 its reverse (122001002), we get a palindrome (322101223).

The spelling of 200100221 in words is "two hundred million, one hundred thousand, two hundred twenty-one".