12111972839 has 2 divisors, whose sum is σ = 12111972840. Its totient is φ = 12111972838.

The previous prime is 12111972827. The next prime is 12111972863. The reversal of 12111972839 is 93827911121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12111972839 - 2¹⁶ = 12111907303 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12111972839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12111972809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055986419 + 6055986420.

It is an arithmetic number, because the mean of its divisors is an integer number (6055986420).

Almost surely, 2^12111972839 is an apocalyptic number.

12111972839 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111972839 is an equidigital number, since it uses as much as digits as its factorization.

12111972839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 44.

The spelling of 12111972839 in words is "twelve billion, one hundred eleven million, nine hundred seventy-two thousand, eight hundred thirty-nine".