12717112072821 has 16 divisors (see below), whose sum is σ = 18441265342080. Its totient is φ = 7748430811200.

The previous prime is 12717112072787. The next prime is 12717112072823. The reversal of 12717112072821 is 12827021171721.

It is not a de Polignac number, because 12717112072821 - 2⁶ = 12717112072757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12717112072823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1614252481 + ... + 1614260358.

It is an arithmetic number, because the mean of its divisors is an integer number (1152579083880).

Almost surely, 2^{12717112072821} is an apocalyptic number.

It is an amenable number.

12717112072821 is a deficient number, since it is larger than the sum of its proper divisors (5724153269259).

12717112072821 is a wasteful number, since it uses less digits than its factorization.

12717112072821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3228512956.

The product of its (nonzero) digits is 43904, while the sum is 42.

The spelling of 12717112072821 in words is "twelve trillion, seven hundred seventeen billion, one hundred twelve million, seventy-two thousand, eight hundred twenty-one".