12123318 has 16 divisors (see below), whose sum is σ = 24462576. Its totient is φ = 4005120.

The previous prime is 12123317. The next prime is 12123341. The reversal of 12123318 is 81332121.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12123294 and 12123303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123317) 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, 8263 + ... + 9618.

It is an arithmetic number, because the mean of its divisors is an integer number (1528911).

Almost surely, 2^12123318 is an apocalyptic number.

12123318 is an abundant number, since it is smaller than the sum of its proper divisors (12339258).

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

12123318 is a wasteful number, since it uses less digits than its factorization.

12123318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17999.

The product of its digits is 288, while the sum is 21.

The square root of 12123318 is about 3481.8555397948. The cubic root of 12123318 is about 229.7244210443.

Adding to 12123318 its reverse (81332121), we get a palindrome (93455439).

The spelling of 12123318 in words is "twelve million, one hundred twenty-three thousand, three hundred eighteen".