321323201 has 2 divisors, whose sum is σ = 321323202. Its totient is φ = 321323200.

The previous prime is 321323183. The next prime is 321323203. The reversal of 321323201 is 102323123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196420225 + 124902976 = 14015^2 + 11176^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321323201 is a prime.

Together with 321323203, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 321323201.

It is not a weakly prime, because it can be changed into another prime (321323203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160661600 + 160661601.

It is an arithmetic number, because the mean of its divisors is an integer number (160661601).

Almost surely, 2^321323201 is an apocalyptic number.

It is an amenable number.

321323201 is a deficient number, since it is larger than the sum of its proper divisors (1).

321323201 is an equidigital number, since it uses as much as digits as its factorization.

321323201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 321323201 is about 17925.4902582886. The cubic root of 321323201 is about 684.9318496499.

Adding to 321323201 its reverse (102323123), we get a palindrome (423646324).

The spelling of 321323201 in words is "three hundred twenty-one million, three hundred twenty-three thousand, two hundred one".