12830814721 has 4 divisors (see below), whose sum is σ = 12831874132. Its totient is φ = 12829755312.

The previous prime is 12830814713. The next prime is 12830814727. The reversal of 12830814721 is 12741803821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12741803821 = 1723 ⋅7395127.

It can be written as a sum of positive squares in 2 ways, for example, as 5589655696 + 7241159025 = 74764^2 + 85095^2 .

It is a cyclic number.

It is not a de Polignac number, because 12830814721 - 2³ = 12830814713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12830814727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 511326 + ... + 535831.

It is an arithmetic number, because the mean of its divisors is an integer number (3207968533).

Almost surely, 2^12830814721 is an apocalyptic number.

It is an amenable number.

12830814721 is a deficient number, since it is larger than the sum of its proper divisors (1059411).

12830814721 is a wasteful number, since it uses less digits than its factorization.

12830814721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059410.

The product of its (nonzero) digits is 21504, while the sum is 37.

The spelling of 12830814721 in words is "twelve billion, eight hundred thirty million, eight hundred fourteen thousand, seven hundred twenty-one".