12721902499 has 4 divisors (see below), whose sum is σ = 12792974760. Its totient is φ = 12650830240.

The previous prime is 12721902493. The next prime is 12721902517. The reversal of 12721902499 is 99420912721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99420912721 = 13 ⋅7647762517.

It is a cyclic number.

It is not a de Polignac number, because 12721902499 - 2⁵ = 12721902467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12721902493) 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, 35535862 + ... + 35536219.

It is an arithmetic number, because the mean of its divisors is an integer number (3198243690).

Almost surely, 2^12721902499 is an apocalyptic number.

12721902499 is a deficient number, since it is larger than the sum of its proper divisors (71072261).

12721902499 is an equidigital number, since it uses as much as digits as its factorization.

12721902499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71072260.

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 12721902499 in words is "twelve billion, seven hundred twenty-one million, nine hundred two thousand, four hundred ninety-nine".