12123112143 has 16 divisors (see below), whose sum is σ = 16463145600. Its totient is φ = 7932994080.

The previous prime is 12123112129. The next prime is 12123112151. The reversal of 12123112143 is 34121132121.

It is not a de Polignac number, because 12123112143 - 2⁹ = 12123111631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123112943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65188 + ... + 168806.

It is an arithmetic number, because the mean of its divisors is an integer number (1028946600).

Almost surely, 2^12123112143 is an apocalyptic number.

12123112143 is a deficient number, since it is larger than the sum of its proper divisors (4340033457).

12123112143 is a wasteful number, since it uses less digits than its factorization.

12123112143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104342.

The product of its digits is 288, while the sum is 21.

Adding to 12123112143 its reverse (34121132121), we get a palindrome (46244244264).

The spelling of 12123112143 in words is "twelve billion, one hundred twenty-three million, one hundred twelve thousand, one hundred forty-three".