12721044206423 has 24 divisors (see below), whose sum is σ = 15017733273312. Its totient is φ = 10555201528704.

The previous prime is 12721044206399. The next prime is 12721044206501. The reversal of 12721044206423 is 32460244012721.

It is a de Polignac number, because none of the positive numbers 2^k-12721044206423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12721044203423) 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 23 ways as a sum of consecutive naturals, for example, 1481336 + ... + 5257037.

It is an arithmetic number, because the mean of its divisors is an integer number (625738886388).

Almost surely, 2^{12721044206423} is an apocalyptic number.

12721044206423 is a deficient number, since it is larger than the sum of its proper divisors (2296689066889).

12721044206423 is an equidigital number, since it uses as much as digits as its factorization.

12721044206423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6738651 (or 6738614 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 38.

The spelling of 12721044206423 in words is "twelve trillion, seven hundred twenty-one billion, forty-four million, two hundred six thousand, four hundred twenty-three".