12721041509 has 16 divisors (see below), whose sum is σ = 13987080000. Its totient is φ = 11473566720.

The previous prime is 12721041499. The next prime is 12721041559. The reversal of 12721041509 is 90514012721.

It is not a de Polignac number, because 12721041509 - 2⁴ = 12721041493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12721041559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 876887 + ... + 891275.

It is an arithmetic number, because the mean of its divisors is an integer number (874192500).

Almost surely, 2^12721041509 is an apocalyptic number.

It is an amenable number.

12721041509 is a deficient number, since it is larger than the sum of its proper divisors (1266038491).

12721041509 is a wasteful number, since it uses less digits than its factorization.

12721041509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15028.

The product of its (nonzero) digits is 5040, while the sum is 32.

The spelling of 12721041509 in words is "twelve billion, seven hundred twenty-one million, forty-one thousand, five hundred nine".