12138885884721 has 8 divisors (see below), whose sum is σ = 16197564644064. Its totient is φ = 8086398857600.

The previous prime is 12138885884711. The next prime is 12138885884771. The reversal of 12138885884721 is 12748858883121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12138885884721 - 2⁵ = 12138885884689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12138885884711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1547928480 + ... + 1547936321.

It is an arithmetic number, because the mean of its divisors is an integer number (2024695580508).

Almost surely, 2^{12138885884721} is an apocalyptic number.

It is an amenable number.

12138885884721 is a deficient number, since it is larger than the sum of its proper divisors (4058678759343).

12138885884721 is a wasteful number, since it uses less digits than its factorization.

12138885884721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3095866111.

The product of its digits is 55050240, while the sum is 66.

The spelling of 12138885884721 in words is "twelve trillion, one hundred thirty-eight billion, eight hundred eighty-five million, eight hundred eighty-four thousand, seven hundred twenty-one".