12123303312 has 80 divisors (see below), whose sum is σ = 32753082240. Its totient is φ = 3856782336.

The previous prime is 12123303293. The next prime is 12123303317. The reversal of 12123303312 is 21330332121.

12123303312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12123303317) 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 15 ways as a sum of consecutive naturals, for example, 492514 + ... + 516542.

It is an arithmetic number, because the mean of its divisors is an integer number (409413528).

Almost surely, 2^12123303312 is an apocalyptic number.

12123303312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12123303312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16376541120).

12123303312 is an abundant number, since it is smaller than the sum of its proper divisors (20629778928).

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

12123303312 is a wasteful number, since it uses less digits than its factorization.

12123303312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24520 (or 24514 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 12123303312 its reverse (21330332121), we get a palindrome (33453635433).

The spelling of 12123303312 in words is "twelve billion, one hundred twenty-three million, three hundred three thousand, three hundred twelve".