12687212687 has 4 divisors (see below), whose sum is σ = 12687445056. Its totient is φ = 12686980320.

The previous prime is 12687212683. The next prime is 12687212711. The reversal of 12687212687 is 78621278621.

12687212687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78621278621 = 191 ⋅411629731.

It is a cyclic number.

It is not a de Polignac number, because 12687212687 - 2² = 12687212683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12687212683) 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 3 ways as a sum of consecutive naturals, for example, 15362 + ... + 160032.

It is an arithmetic number, because the mean of its divisors is an integer number (3171861264).

Almost surely, 2^12687212687 is an apocalyptic number.

12687212687 is a deficient number, since it is larger than the sum of its proper divisors (232369).

12687212687 is an equidigital number, since it uses as much as digits as its factorization.

12687212687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232368.

The product of its digits is 903168, while the sum is 50.

The spelling of 12687212687 in words is "twelve billion, six hundred eighty-seven million, two hundred twelve thousand, six hundred eighty-seven".