321000002321 has 2 divisors, whose sum is σ = 321000002322. Its totient is φ = 321000002320.

The previous prime is 321000002317. The next prime is 321000002327. The reversal of 321000002321 is 123200000123.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 320016490000 + 983512321 = 565700^2 + 31361^2 .

It is a cyclic number.

It is not a de Polignac number, because 321000002321 - 2² = 321000002317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321000002296 and 321000002305.

It is not a weakly prime, because it can be changed into another prime (321000002327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160500001160 + 160500001161.

It is an arithmetic number, because the mean of its divisors is an integer number (160500001161).

Almost surely, 2^321000002321 is an apocalyptic number.

It is an amenable number.

321000002321 is a deficient number, since it is larger than the sum of its proper divisors (1).

321000002321 is an equidigital number, since it uses as much as digits as its factorization.

321000002321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 321000002321 its reverse (123200000123), we get a palindrome (444200002444).

The spelling of 321000002321 in words is "three hundred twenty-one billion, two thousand, three hundred twenty-one".