12523200721 has 8 divisors (see below), whose sum is σ = 12564494280. Its totient is φ = 12481932288.

The previous prime is 12523200707. The next prime is 12523200733. The reversal of 12523200721 is 12700232521.

It can be written as a sum of positive squares in 4 ways, for example, as 906672321 + 11616528400 = 30111^2 + 107780^2 .

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 12523200721 - 2⁷ = 12523200593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12529200721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1903125 + ... + 1909693.

It is an arithmetic number, because the mean of its divisors is an integer number (1570561785).

Almost surely, 2^12523200721 is an apocalyptic number.

It is an amenable number.

12523200721 is a deficient number, since it is larger than the sum of its proper divisors (41293559).

12523200721 is an equidigital number, since it uses as much as digits as its factorization.

12523200721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12563.

The product of its (nonzero) digits is 1680, while the sum is 25.

The spelling of 12523200721 in words is "twelve billion, five hundred twenty-three million, two hundred thousand, seven hundred twenty-one".