12128308909 has 8 divisors (see below), whose sum is σ = 12182607360. Its totient is φ = 12074072976.

The previous prime is 12128308897. The next prime is 12128308991. The reversal of 12128308909 is 90980382121.

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 12128308909 - 2²⁹ = 11591437997 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 (12128308999) 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, 397407 + ... + 426835.

It is an arithmetic number, because the mean of its divisors is an integer number (1522825920).

Almost surely, 2^12128308909 is an apocalyptic number.

It is an amenable number.

12128308909 is a deficient number, since it is larger than the sum of its proper divisors (54298451).

12128308909 is a wasteful number, since it uses less digits than its factorization.

12128308909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31259.

The product of its (nonzero) digits is 62208, while the sum is 43.

The spelling of 12128308909 in words is "twelve billion, one hundred twenty-eight million, three hundred eight thousand, nine hundred nine".