12721902500 has 30 divisors (see below), whose sum is σ = 27820261854. Its totient is φ = 5088760000.

The previous prime is 12721902493. The next prime is 12721902517. The reversal of 12721902500 is 520912721.

12721902500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 4271145316 + 8450757184 = 65354^2 + 91928^2 .

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 2541881 + ... + 2546880.

Almost surely, 2^12721902500 is an apocalyptic number.

12721902500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12721902500 is an abundant number, since it is smaller than the sum of its proper divisors (15098359354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12721902500 is an equidigital number, since it uses as much as digits as its factorization.

12721902500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5088785 (or 5088768 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 29.

The spelling of 12721902500 in words is "twelve billion, seven hundred twenty-one million, nine hundred two thousand, five hundred".