12123324243 has 64 divisors (see below), whose sum is σ = 19407667200. Its totient is φ = 7455278880.

The previous prime is 12123324221. The next prime is 12123324253. The reversal of 12123324243 is 34242332121.

12123324243 is a `hidden beast` number, since 1 + 2 + 1 + 233 + 2 + 424 + 3 = 666.

It is not a de Polignac number, because 12123324243 - 2⁹ = 12123323731 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12123324253) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5086230 + ... + 5088612.

It is an arithmetic number, because the mean of its divisors is an integer number (303244800).

Almost surely, 2^12123324243 is an apocalyptic number.

12123324243 is a deficient number, since it is larger than the sum of its proper divisors (7284342957).

12123324243 is a wasteful number, since it uses less digits than its factorization.

12123324243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2669 (or 2663 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

Adding to 12123324243 its reverse (34242332121), we get a palindrome (46365656364).

The spelling of 12123324243 in words is "twelve billion, one hundred twenty-three million, three hundred twenty-four thousand, two hundred forty-three".