12123423312 has 160 divisors (see below), whose sum is σ = 42050641920. Its totient is φ = 2906703360.

The previous prime is 12123423289. The next prime is 12123423329. The reversal of 12123423312 is 21332432121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78112 + ... + 174207.

It is an arithmetic number, because the mean of its divisors is an integer number (262816512).

Almost surely, 2^12123423312 is an apocalyptic number.

12123423312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12123423312 is an abundant number, since it is smaller than the sum of its proper divisors (29927218608).

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

12123423312 is a wasteful number, since it uses less digits than its factorization.

12123423312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252361 (or 252355 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

Adding to 12123423312 its reverse (21332432121), we get a palindrome (33455855433).

The spelling of 12123423312 in words is "twelve billion, one hundred twenty-three million, four hundred twenty-three thousand, three hundred twelve".