12987012987 has 64 divisors (see below), whose sum is σ = 21492885120. Its totient is φ = 7698240000.

The previous prime is 12987012979. The next prime is 12987013009. The reversal of 12987012987 is 78921078921.

12987012987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12987012987 - 2³ = 12987012979 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (12987012937) 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 in 63 ways as a sum of consecutive naturals, for example, 1306737 + ... + 1316637.

It is an arithmetic number, because the mean of its divisors is an integer number (335826330).

Almost surely, 2^12987012987 is an apocalyptic number.

12987012987 is a deficient number, since it is larger than the sum of its proper divisors (8505872133).

12987012987 is a wasteful number, since it uses less digits than its factorization.

12987012987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10061 (or 10055 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 54.

The spelling of 12987012987 in words is "twelve billion, nine hundred eighty-seven million, twelve thousand, nine hundred eighty-seven".