12943566534921 has 16 divisors (see below), whose sum is σ = 18867320679168. Its totient is φ = 7827787941200.

The previous prime is 12943566534919. The next prime is 12943566534967.

12943566534921 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 12943566534921 - 2¹ = 12943566534919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12943566534991) 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 15 ways as a sum of consecutive naturals, for example, 419930295 + ... + 419961116.

It is an arithmetic number, because the mean of its divisors is an integer number (1179207542448).

Almost surely, 2^{12943566534921} is an apocalyptic number.

12943566534921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12943566534921 is a deficient number, since it is larger than the sum of its proper divisors (5923754144247).

12943566534921 is a wasteful number, since it uses less digits than its factorization.

12943566534921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839891892.

The product of its digits is 41990400, while the sum is 60.

The spelling of 12943566534921 in words is "twelve trillion, nine hundred forty-three billion, five hundred sixty-six million, five hundred thirty-four thousand, nine hundred twenty-one".