12123442312 has 16 divisors (see below), whose sum is σ = 22858448400. Its totient is φ = 6027856080.

The previous prime is 12123442283. The next prime is 12123442319. The reversal of 12123442312 is 21324432121.

It is not an unprimeable number, because it can be changed into a prime (12123442319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4231614 + ... + 4234477.

It is an arithmetic number, because the mean of its divisors is an integer number (1428653025).

Almost surely, 2^12123442312 is an apocalyptic number.

It is an amenable number.

12123442312 is a deficient number, since it is larger than the sum of its proper divisors (10735006088).

12123442312 is a wasteful number, since it uses less digits than its factorization.

12123442312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8466276 (or 8466272 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

Adding to 12123442312 its reverse (21324432121), we get a palindrome (33447874433).

The spelling of 12123442312 in words is "twelve billion, one hundred twenty-three million, four hundred forty-two thousand, three hundred twelve".