12031231123 has 2 divisors, whose sum is σ = 12031231124. Its totient is φ = 12031231122.

The previous prime is 12031231097. The next prime is 12031231141. The reversal of 12031231123 is 32113213021.

It is a strong prime.

It is an emirp because it is prime and its reverse (32113213021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12031231123 - 2⁹ = 12031230611 is a prime.

It is a super-2 number, since 2×12031231123² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12031231123.

It is not a weakly prime, because it can be changed into another prime (12031231193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6015615561 + 6015615562.

It is an arithmetic number, because the mean of its divisors is an integer number (6015615562).

Almost surely, 2^12031231123 is an apocalyptic number.

12031231123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12031231123 is an equidigital number, since it uses as much as digits as its factorization.

12031231123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 12031231123 its reverse (32113213021), we get a palindrome (44144444144).

The spelling of 12031231123 in words is "twelve billion, thirty-one million, two hundred thirty-one thousand, one hundred twenty-three".