123311321 has 8 divisors (see below), whose sum is σ = 141265344. Its totient is φ = 105441840.

The previous prime is 123311299. The next prime is 123311323. The reversal of 123311321 is 123113321.

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

It is a de Polignac number, because none of the positive numbers 2^k-123311321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 123311321.

It is not an unprimeable number, because it can be changed into a prime (123311323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17975 + ... + 23868.

It is an arithmetic number, because the mean of its divisors is an integer number (17658168).

Almost surely, 2^123311321 is an apocalyptic number.

It is an amenable number.

123311321 is a deficient number, since it is larger than the sum of its proper divisors (17954023).

123311321 is an equidigital number, since it uses as much as digits as its factorization.

123311321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42271.

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

The square root of 123311321 is about 11104.5630710983. The cubic root of 123311321 is about 497.7382120581.

Adding to 123311321 its reverse (123113321), we get a palindrome (246424642).

The spelling of 123311321 in words is "one hundred twenty-three million, three hundred eleven thousand, three hundred twenty-one".