123123321 has 20 divisors (see below), whose sum is σ = 184223952. Its totient is φ = 81948888.

The previous prime is 123123311. The next prime is 123123323. The reversal of 123123321 is 123321321.

It is not a de Polignac number, because 123123321 - 2¹³ = 123115129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123123294 and 123123303.

It is not an unprimeable number, because it can be changed into a prime (123123323) 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 19 ways as a sum of consecutive naturals, for example, 93550 + ... + 94856.

Almost surely, 2^123123321 is an apocalyptic number.

It is an amenable number.

123123321 is a deficient number, since it is larger than the sum of its proper divisors (61100631).

123123321 is a wasteful number, since it uses less digits than its factorization.

123123321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2482 (or 2473 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 123123321 is about 11096.0948535960. The cubic root of 123123321 is about 497.4851334328.

Adding to 123123321 its reverse (123321321), we get a palindrome (246444642).

The spelling of 123123321 in words is "one hundred twenty-three million, one hundred twenty-three thousand, three hundred twenty-one".