321021304321 has 8 divisors (see below), whose sum is σ = 332185213800. Its totient is φ = 309863675520.

The previous prime is 321021304277. The next prime is 321021304349. The reversal of 321021304321 is 123403120123.

It can be written as a sum of positive squares in 4 ways, for example, as 7909434225 + 313111870096 = 88935^2 + 559564^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 321021304321 - 2⁹ = 321021303809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321021304292 and 321021304301.

It is not an unprimeable number, because it can be changed into a prime (321021304381) 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, 1466050 + ... + 1670731.

It is an arithmetic number, because the mean of its divisors is an integer number (41523151725).

Almost surely, 2^321021304321 is an apocalyptic number.

It is an amenable number.

321021304321 is a deficient number, since it is larger than the sum of its proper divisors (11163909479).

321021304321 is a wasteful number, since it uses less digits than its factorization.

321021304321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3140339.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 321021304321 its reverse (123403120123), we get a palindrome (444424424444).

The spelling of 321021304321 in words is "three hundred twenty-one billion, twenty-one million, three hundred four thousand, three hundred twenty-one".