321331123 has 2 divisors, whose sum is σ = 321331124. Its totient is φ = 321331122.

The previous prime is 321331099. The next prime is 321331133. The reversal of 321331123 is 321133123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321331123 - 2¹³ = 321322931 is a prime.

It is a super-2 number, since 2×321331123² = 206507381216882258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 321331123.

It is not a weakly prime, because it can be changed into another prime (321331133) 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 as a sum of consecutive naturals, namely, 160665561 + 160665562.

It is an arithmetic number, because the mean of its divisors is an integer number (160665562).

Almost surely, 2^321331123 is an apocalyptic number.

321331123 is a deficient number, since it is larger than the sum of its proper divisors (1).

321331123 is an equidigital number, since it uses as much as digits as its factorization.

321331123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 19.

The square root of 321331123 is about 17925.7112271731. The cubic root of 321331123 is about 684.9374784431.

Adding to 321331123 its reverse (321133123), we get a palindrome (642464246).

The spelling of 321331123 in words is "three hundred twenty-one million, three hundred thirty-one thousand, one hundred twenty-three".