321303121 has 2 divisors, whose sum is σ = 321303122. Its totient is φ = 321303120.

The previous prime is 321303109. The next prime is 321303133. The reversal of 321303121 is 121303123.

It is a balanced prime because it is at equal distance from previous prime (321303109) and next prime (321303133).

It can be written as a sum of positive squares in only one way, i.e., 213890625 + 107412496 = 14625^2 + 10364^2 .

It is a cyclic number.

It is not a de Polignac number, because 321303121 - 2¹³ = 321294929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321303095 and 321303104.

It is not a weakly prime, because it can be changed into another prime (321303161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160651560 + 160651561.

It is an arithmetic number, because the mean of its divisors is an integer number (160651561).

Almost surely, 2^321303121 is an apocalyptic number.

It is an amenable number.

321303121 is a deficient number, since it is larger than the sum of its proper divisors (1).

321303121 is an equidigital number, since it uses as much as digits as its factorization.

321303121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 321303121 is about 17924.9301532809. The cubic root of 321303121 is about 684.9175818576.

Adding to 321303121 its reverse (121303123), we get a palindrome (442606244).

The spelling of 321303121 in words is "three hundred twenty-one million, three hundred three thousand, one hundred twenty-one".