12130640391 has 4 divisors (see below), whose sum is σ = 16174187192. Its totient is φ = 8087093592.

The previous prime is 12130640329. The next prime is 12130640393. The reversal of 12130640391 is 19304603121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12130640391 - 2¹¹ = 12130638343 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 (12130640393) 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, 2021773396 + ... + 2021773401.

It is an arithmetic number, because the mean of its divisors is an integer number (4043546798).

Almost surely, 2^12130640391 is an apocalyptic number.

12130640391 is a deficient number, since it is larger than the sum of its proper divisors (4043546801).

12130640391 is an equidigital number, since it uses as much as digits as its factorization.

12130640391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4043546800.

The product of its (nonzero) digits is 3888, while the sum is 30.

The spelling of 12130640391 in words is "twelve billion, one hundred thirty million, six hundred forty thousand, three hundred ninety-one".