321241221 has 20 divisors (see below), whose sum is σ = 548433952. Its totient is φ = 183566088.

The previous prime is 321241187. The next prime is 321241223. The reversal of 321241221 is 122142123.

It is a happy number.

It is not a de Polignac number, because 321241221 - 2¹¹ = 321239173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321241194 and 321241203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321241223) 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 19 ways as a sum of consecutive naturals, for example, 282715 + ... + 283848.

Almost surely, 2^321241221 is an apocalyptic number.

It is an amenable number.

321241221 is a deficient number, since it is larger than the sum of its proper divisors (227192731).

321241221 is an equidigital number, since it uses as much as digits as its factorization.

321241221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566582 (or 566573 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 321241221 is about 17923.2034246113. The cubic root of 321241221 is about 684.8735952311.

Adding to 321241221 its reverse (122142123), we get a palindrome (443383344).

The spelling of 321241221 in words is "three hundred twenty-one million, two hundred forty-one thousand, two hundred twenty-one".