12115552987 has 2 divisors, whose sum is σ = 12115552988. Its totient is φ = 12115552986.

The previous prime is 12115552951. The next prime is 12115552997. The reversal of 12115552987 is 78925551121.

It is a happy number.

12115552987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12115552987 is a prime.

It is not a weakly prime, because it can be changed into another prime (12115552997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6057776493 + 6057776494.

It is an arithmetic number, because the mean of its divisors is an integer number (6057776494).

Almost surely, 2^12115552987 is an apocalyptic number.

12115552987 is a deficient number, since it is larger than the sum of its proper divisors (1).

12115552987 is an equidigital number, since it uses as much as digits as its factorization.

12115552987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252000, while the sum is 46.

The spelling of 12115552987 in words is "twelve billion, one hundred fifteen million, five hundred fifty-two thousand, nine hundred eighty-seven".