12123214144 has 56 divisors (see below), whose sum is σ = 24878995200. Its totient is φ = 5855216640.

The previous prime is 12123214139. The next prime is 12123214163. The reversal of 12123214144 is 44141232121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1123527 + ... + 1134265.

Almost surely, 2^12123214144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12123214144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12439497600).

12123214144 is an abundant number, since it is smaller than the sum of its proper divisors (12755781056).

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

12123214144 is a wasteful number, since it uses less digits than its factorization.

12123214144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11351 (or 11341 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

Adding to 12123214144 its reverse (44141232121), we get a palindrome (56264446265).

The spelling of 12123214144 in words is "twelve billion, one hundred twenty-three million, two hundred fourteen thousand, one hundred forty-four".