321124321 has 16 divisors (see below), whose sum is σ = 383616000. Its totient is φ = 262828368.

The previous prime is 321124291. The next prime is 321124343. The reversal of 321124321 is 123421123.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 321124321 - 2²⁵ = 287569889 is a prime.

It is a super-2 number, since 2×321124321² = 206241659075422082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321124021) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 117630 + ... + 120328.

It is an arithmetic number, because the mean of its divisors is an integer number (23976000).

Almost surely, 2^321124321 is an apocalyptic number.

It is an amenable number.

321124321 is a deficient number, since it is larger than the sum of its proper divisors (62491679).

321124321 is a wasteful number, since it uses less digits than its factorization.

321124321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3468.

The product of its digits is 288, while the sum is 19.

The square root of 321124321 is about 17919.9419920936. The cubic root of 321124321 is about 684.7905097577.

Adding to 321124321 its reverse (123421123), we get a palindrome (444545444).

It can be divided in two parts, 3211243 and 21, that added together give a square (3211264 = 1792²).

The spelling of 321124321 in words is "three hundred twenty-one million, one hundred twenty-four thousand, three hundred twenty-one".