11723724871321 has 4 divisors (see below), whose sum is σ = 11724198907492. Its totient is φ = 11723250835152.

The previous prime is 11723724871273. The next prime is 11723724871333. The reversal of 11723724871321 is 12317842732711.

11723724871321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3660334240000 + 8063390631321 = 1913200^2 + 2839611^2 .

It is a cyclic number.

It is not a de Polignac number, because 11723724871321 - 2⁷ = 11723724871193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11723724871351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236980986 + ... + 237030451.

It is an arithmetic number, because the mean of its divisors is an integer number (2931049726873).

Almost surely, 2^{11723724871321} is an apocalyptic number.

It is an amenable number.

11723724871321 is a deficient number, since it is larger than the sum of its proper divisors (474036171).

11723724871321 is an equidigital number, since it uses as much as digits as its factorization.

11723724871321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474036170.

The product of its digits is 790272, while the sum is 49.

The spelling of 11723724871321 in words is "eleven trillion, seven hundred twenty-three billion, seven hundred twenty-four million, eight hundred seventy-one thousand, three hundred twenty-one".