12389460721 has 8 divisors (see below), whose sum is σ = 13585807584. Its totient is φ = 11204785920.

The previous prime is 12389460697. The next prime is 12389460731. The reversal of 12389460721 is 12706498321.

12389460721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12389460721 - 2⁵ = 12389460689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12389460731) 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 7 ways as a sum of consecutive naturals, for example, 2915791 + ... + 2920036.

It is an arithmetic number, because the mean of its divisors is an integer number (1698225948).

Almost surely, 2^12389460721 is an apocalyptic number.

12389460721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12389460721 is a deficient number, since it is larger than the sum of its proper divisors (1196346863).

12389460721 is a wasteful number, since it uses less digits than its factorization.

12389460721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5836031.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 12389460721 in words is "twelve billion, three hundred eighty-nine million, four hundred sixty thousand, seven hundred twenty-one".