221201 has 2 divisors, whose sum is σ = 221202. Its totient is φ = 221200.

The previous prime is 221197. The next prime is 221203. The reversal of 221201 is 102122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201601 + 19600 = 449^2 + 140^2 .

It is a cyclic number.

It is not a de Polignac number, because 221201 - 2² = 221197 is a prime.

Together with 221203, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600 + 110601.

It is an arithmetic number, because the mean of its divisors is an integer number (110601).

2²²¹²⁰¹ is an apocalyptic number.

It is an amenable number.

221201 is a deficient number, since it is larger than the sum of its proper divisors (1).

221201 is an equidigital number, since it uses as much as digits as its factorization.

221201 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 8.

The square root of 221201 is about 470.3201037591. The cubic root of 221201 is about 60.4777597373.

Adding to 221201 its reverse (102122), we get a palindrome (323323).

The spelling of 221201 in words is "two hundred twenty-one thousand, two hundred one", and thus it is an iban number.