12109320 has 48 divisors (see below), whose sum is σ = 39356460. Its totient is φ = 3229056.

The previous prime is 12109319. The next prime is 12109343. The reversal of 12109320 is 2390121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10850436 + 1258884 = 3294^2 + 1122^2 .

It is a super-3 number, since 3×12109320³ (a number of 22 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12109293 and 12109302.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16459 + ... + 17178.

Almost surely, 2^12109320 is an apocalyptic number.

12109320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12109320 is an abundant number, since it is smaller than the sum of its proper divisors (27247140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12109320 is a wasteful number, since it uses less digits than its factorization.

12109320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33654 (or 33647 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 12109320 is about 3479.8448241265. The cubic root of 12109320 is about 229.6359710868.

Adding to 12109320 its reverse (2390121), we get a palindrome (14499441).

The spelling of 12109320 in words is "twelve million, one hundred nine thousand, three hundred twenty".