12721815707 has 16 divisors (see below), whose sum is σ = 12920573952. Its totient is φ = 12525046560.

The previous prime is 12721815703. The next prime is 12721815721. The reversal of 12721815707 is 70751812721.

12721815707 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12721815707 - 2² = 12721815703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12721815703) 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 15 ways as a sum of consecutive naturals, for example, 11388713 + ... + 11389829.

It is an arithmetic number, because the mean of its divisors is an integer number (807535872).

Almost surely, 2^12721815707 is an apocalyptic number.

12721815707 is a deficient number, since it is larger than the sum of its proper divisors (198758245).

12721815707 is a wasteful number, since it uses less digits than its factorization.

12721815707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1858.

The product of its (nonzero) digits is 54880, while the sum is 41.

The spelling of 12721815707 in words is "twelve billion, seven hundred twenty-one million, eight hundred fifteen thousand, seven hundred seven".