221200201 has 8 divisors (see below), whose sum is σ = 223777800. Its totient is φ = 218630400.

The previous prime is 221200193. The next prime is 221200211. The reversal of 221200201 is 102002122.

It can be written as a sum of positive squares in 4 ways, for example, as 97990201 + 123210000 = 9899^2 + 11100^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221200201 - 2³ = 221200193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221200211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70065 + ... + 73153.

It is an arithmetic number, because the mean of its divisors is an integer number (27972225).

Almost surely, 2^221200201 is an apocalyptic number.

It is an amenable number.

221200201 is a deficient number, since it is larger than the sum of its proper divisors (2577599).

221200201 is a wasteful number, since it uses less digits than its factorization.

221200201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3899.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 221200201 is about 14872.8007113657. The cubic root of 221200201 is about 604.7768692002.

Adding to 221200201 its reverse (102002122), we get a palindrome (323202323).

The spelling of 221200201 in words is "two hundred twenty-one million, two hundred thousand, two hundred one".