321103321 has 24 divisors (see below), whose sum is σ = 412698240. Its totient is φ = 247010400.

The previous prime is 321103319. The next prime is 321103337. The reversal of 321103321 is 123301123.

It is not a de Polignac number, because 321103321 - 2¹ = 321103319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321103295 and 321103304.

It is not an unprimeable number, because it can be changed into a prime (321103351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38811 + ... + 46351.

It is an arithmetic number, because the mean of its divisors is an integer number (17195760).

Almost surely, 2^321103321 is an apocalyptic number.

It is an amenable number.

321103321 is a deficient number, since it is larger than the sum of its proper divisors (91594919).

321103321 is a wasteful number, since it uses less digits than its factorization.

321103321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7645 (or 7638 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 321103321 is about 17919.3560431172. The cubic root of 321103321 is about 684.7755820871.

Adding to 321103321 its reverse (123301123), we get a palindrome (444404444).

The spelling of 321103321 in words is "three hundred twenty-one million, one hundred three thousand, three hundred twenty-one".