321504320013 has 8 divisors (see below), whose sum is σ = 428676080448. Its totient is φ = 214334386464.

The previous prime is 321504319963. The next prime is 321504320051. The reversal of 321504320013 is 310023405123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 321504320013 - 2¹² = 321504315917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321504320713) 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 in 7 ways as a sum of consecutive naturals, for example, 27145 + ... + 802337.

It is an arithmetic number, because the mean of its divisors is an integer number (53584510056).

Almost surely, 2^321504320013 is an apocalyptic number.

It is an amenable number.

321504320013 is a deficient number, since it is larger than the sum of its proper divisors (107171760435).

321504320013 is a wasteful number, since it uses less digits than its factorization.

321504320013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913443.

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 321504320013 its reverse (310023405123), we get a palindrome (631527725136).

The spelling of 321504320013 in words is "three hundred twenty-one billion, five hundred four million, three hundred twenty thousand, thirteen".