301221 has 6 divisors (see below), whose sum is σ = 435110. Its totient is φ = 200808.

The previous prime is 301219. The next prime is 301237. The reversal of 301221 is 122103.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 236196 + 65025 = 486^2 + 255^2 .

It is not a de Polignac number, because 301221 - 2¹ = 301219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 33469 = 301221 / (3 + 0 + 1 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (301211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16726 + ... + 16743.

2³⁰¹²²¹ is an apocalyptic number.

It is an amenable number.

301221 is a deficient number, since it is larger than the sum of its proper divisors (133889).

301221 is a wasteful number, since it uses less digits than its factorization.

301221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33475 (or 33472 counting only the distinct ones).

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

The square root of 301221 is about 548.8360410906. The cubic root of 301221 is about 67.0339918108.

Adding to 301221 its reverse (122103), we get a palindrome (423324).

The spelling of 301221 in words is "three hundred one thousand, two hundred twenty-one", and thus it is an iban number.