123321321 has 12 divisors (see below), whose sum is σ = 181051780. Its totient is φ = 80866080.

The previous prime is 123321313. The next prime is 123321329. The reversal of 123321321 is 123123321.

123321321 is a `hidden beast` number, since 1 + 23 + 321 + 321 = 666.

It is an interprime number because it is at equal distance from previous prime (123321313) and next prime (123321329).

It can be written as a sum of positive squares in 2 ways, for example, as 65028096 + 58293225 = 8064^2 + 7635^2 .

It is not a de Polignac number, because 123321321 - 2³ = 123321313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123321294 and 123321303.

It is not an unprimeable number, because it can be changed into a prime (123321329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111766 + ... + 112863.

Almost surely, 2^123321321 is an apocalyptic number.

It is an amenable number.

123321321 is a deficient number, since it is larger than the sum of its proper divisors (57730459).

123321321 is a wasteful number, since it uses less digits than its factorization.

123321321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224696 (or 224693 counting only the distinct ones).

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

The square root of 123321321 is about 11105.0133273220. The cubic root of 123321321 is about 497.7516664799.

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

The spelling of 123321321 in words is "one hundred twenty-three million, three hundred twenty-one thousand, three hundred twenty-one".