221301 has 12 divisors (see below), whose sum is σ = 325312. Its totient is φ = 144936.

The previous prime is 221281. The next prime is 221303. The reversal of 221301 is 103122.

It is a happy number.

221301 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221301 - 2⁷ = 221173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

221301 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 420 + ... + 786.

2²²¹³⁰¹ is an apocalyptic number.

It is an amenable number.

221301 is a deficient number, since it is larger than the sum of its proper divisors (104011).

221301 is a wasteful number, since it uses less digits than its factorization.

221301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440 (or 437 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 221301 is about 470.4264023203. The cubic root of 221301 is about 60.4868719096.

Adding to 221301 its reverse (103122), we get a palindrome (324423).

The spelling of 221301 in words is "two hundred twenty-one thousand, three hundred one", and thus it is an iban number.