12682721224 has 16 divisors (see below), whose sum is σ = 24360105420. Its totient is φ = 6186693120.

The previous prime is 12682721201. The next prime is 12682721237. The reversal of 12682721224 is 42212728621.

It can be written as a sum of positive squares in 2 ways, for example, as 8609984100 + 4072737124 = 92790^2 + 63818^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19333089 + ... + 19333744.

Almost surely, 2^12682721224 is an apocalyptic number.

It is an amenable number.

12682721224 is a deficient number, since it is larger than the sum of its proper divisors (11677384196).

12682721224 is a wasteful number, since it uses less digits than its factorization.

12682721224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38666880 (or 38666876 counting only the distinct ones).

The product of its digits is 43008, while the sum is 37.

The spelling of 12682721224 in words is "twelve billion, six hundred eighty-two million, seven hundred twenty-one thousand, two hundred twenty-four".