321025213345 has 4 divisors (see below), whose sum is σ = 385230256020. Its totient is φ = 256820170672.

The previous prime is 321025213339. The next prime is 321025213387. The reversal of 321025213345 is 543312520123.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 202435205184 + 118590008161 = 449928^2 + 344369^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321025213345 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32102521330 + ... + 32102521339.

It is an arithmetic number, because the mean of its divisors is an integer number (96307564005).

Almost surely, 2^321025213345 is an apocalyptic number.

It is an amenable number.

321025213345 is a deficient number, since it is larger than the sum of its proper divisors (64205042675).

321025213345 is an equidigital number, since it uses as much as digits as its factorization.

321025213345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64205042674.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 321025213345 its reverse (543312520123), we get a palindrome (864337733468).

The spelling of 321025213345 in words is "three hundred twenty-one billion, twenty-five million, two hundred thirteen thousand, three hundred forty-five".