200000221 has 2 divisors, whose sum is σ = 200000222. Its totient is φ = 200000220.

The previous prime is 200000209. The next prime is 200000237. The reversal of 200000221 is 122000002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115562500 + 84437721 = 10750^2 + 9189^2 .

It is a cyclic number.

It is not a de Polignac number, because 200000221 - 2⁷ = 200000093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200000201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100000110 + 100000111.

It is an arithmetic number, because the mean of its divisors is an integer number (100000111).

Almost surely, 2^200000221 is an apocalyptic number.

It is an amenable number.

200000221 is a deficient number, since it is larger than the sum of its proper divisors (1).

200000221 is an equidigital number, since it uses as much as digits as its factorization.

200000221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 200000221 is about 14142.1434372587. The cubic root of 200000221 is about 584.8037630451.

Adding to 200000221 its reverse (122000002), we get a palindrome (322000223).

The spelling of 200000221 in words is "two hundred million, two hundred twenty-one", and thus it is an aban number.