12312112123 has 2 divisors, whose sum is σ = 12312112124. Its totient is φ = 12312112122.

The previous prime is 12312112121. The next prime is 12312112177. The reversal of 12312112123 is 32121121321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12312112123 - 2¹ = 12312112121 is a prime.

Together with 12312112121, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12312112123.

It is not a weakly prime, because it can be changed into another prime (12312112121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6156056061 + 6156056062.

It is an arithmetic number, because the mean of its divisors is an integer number (6156056062).

Almost surely, 2^12312112123 is an apocalyptic number.

12312112123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12312112123 is an equidigital number, since it uses as much as digits as its factorization.

12312112123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 19.

Adding to 12312112123 its reverse (32121121321), we get a palindrome (44433233444).

The spelling of 12312112123 in words is "twelve billion, three hundred twelve million, one hundred twelve thousand, one hundred twenty-three".