12116831 has 2 divisors, whose sum is σ = 12116832. Its totient is φ = 12116830.

The previous prime is 12116821. The next prime is 12116833. The reversal of 12116831 is 13861121.

It is a strong prime.

It is an emirp because it is prime and its reverse (13861121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12116831 is a prime.

It is a super-2 number, since 2×12116831² = 293635186965122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 12116833, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12116797 and 12116806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12116833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6058415 + 6058416.

It is an arithmetic number, because the mean of its divisors is an integer number (6058416).

Almost surely, 2^12116831 is an apocalyptic number.

12116831 is a deficient number, since it is larger than the sum of its proper divisors (1).

12116831 is an equidigital number, since it uses as much as digits as its factorization.

12116831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 23.

The square root of 12116831 is about 3480.9238716180. The cubic root of 12116831 is about 229.6834397388.

Adding to 12116831 its reverse (13861121), we get a palindrome (25977952).

The spelling of 12116831 in words is "twelve million, one hundred sixteen thousand, eight hundred thirty-one".