321304121 has 2 divisors, whose sum is σ = 321304122. Its totient is φ = 321304120.

The previous prime is 321304103. The next prime is 321304153. The reversal of 321304121 is 121403123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 294637225 + 26666896 = 17165^2 + 5164^2 .

It is a cyclic number.

It is not a de Polignac number, because 321304121 - 2¹⁰ = 321303097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 321304121.

It is not a weakly prime, because it can be changed into another prime (321300121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160652060 + 160652061.

It is an arithmetic number, because the mean of its divisors is an integer number (160652061).

Almost surely, 2^321304121 is an apocalyptic number.

It is an amenable number.

321304121 is a deficient number, since it is larger than the sum of its proper divisors (1).

321304121 is an equidigital number, since it uses as much as digits as its factorization.

321304121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 321304121 is about 17924.9580473707. The cubic root of 321304121 is about 684.9182924191.

Adding to 321304121 its reverse (121403123), we get a palindrome (442707244).

The spelling of 321304121 in words is "three hundred twenty-one million, three hundred four thousand, one hundred twenty-one".