221000201 has 4 divisors (see below), whose sum is σ = 221241600. Its totient is φ = 220758804.

The previous prime is 221000141. The next prime is 221000243. The reversal of 221000201 is 102000122.

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 221000201 - 2⁶ = 221000137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221000281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119321 + ... + 121158.

It is an arithmetic number, because the mean of its divisors is an integer number (55310400).

Almost surely, 2^221000201 is an apocalyptic number.

It is an amenable number.

221000201 is a deficient number, since it is larger than the sum of its proper divisors (241399).

221000201 is an equidigital number, since it uses as much as digits as its factorization.

221000201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241398.

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

The square root of 221000201 is about 14866.0755076785. The cubic root of 221000201 is about 604.5945428945.

Adding to 221000201 its reverse (102000122), we get a palindrome (323000323).

The spelling of 221000201 in words is "two hundred twenty-one million, two hundred one", and thus it is an aban number.