321123131 has 32 divisors (see below), whose sum is σ = 386684928. Its totient is φ = 261031680.

The previous prime is 321123109. The next prime is 321123133. The reversal of 321123131 is 131321123.

It is not a de Polignac number, because 321123131 - 2⁶ = 321123067 is a prime.

It is a super-2 number, since 2×321123131² = 206240130526486322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (321123133) 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 31 ways as a sum of consecutive naturals, for example, 1922810 + ... + 1922976.

It is an arithmetic number, because the mean of its divisors is an integer number (12083904).

Almost surely, 2^321123131 is an apocalyptic number.

321123131 is a deficient number, since it is larger than the sum of its proper divisors (65561797).

321123131 is a wasteful number, since it uses less digits than its factorization.

321123131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371.

The product of its digits is 108, while the sum is 17.

The square root of 321123131 is about 17919.9087888304. The cubic root of 321123131 is about 684.7896638737.

Adding to 321123131 its reverse (131321123), we get a palindrome (452444254).

The spelling of 321123131 in words is "three hundred twenty-one million, one hundred twenty-three thousand, one hundred thirty-one".