12123003312 has 120 divisors (see below), whose sum is σ = 38958816000. Its totient is φ = 3447239040.

The previous prime is 12123003271. The next prime is 12123003317. The reversal of 12123003312 is 21330032121.

12123003312 is a `hidden beast` number, since 121 + 230 + 0 + 3 + 312 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (12123003317) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 184189 + ... + 241187.

It is an arithmetic number, because the mean of its divisors is an integer number (324656800).

Almost surely, 2^12123003312 is an apocalyptic number.

12123003312 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 12123003312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19479408000).

12123003312 is an abundant number, since it is smaller than the sum of its proper divisors (26835812688).

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

12123003312 is a wasteful number, since it uses less digits than its factorization.

12123003312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57231 (or 57222 counting only the distinct ones).

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

Adding to 12123003312 its reverse (21330032121), we get a palindrome (33453035433).

The spelling of 12123003312 in words is "twelve billion, one hundred twenty-three million, three thousand, three hundred twelve".