12112009391 has 8 divisors (see below), whose sum is σ = 12596861904. Its totient is φ = 11636392320.

The previous prime is 12112009381. The next prime is 12112009421. The reversal of 12112009391 is 19390021121.

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 12112009391 - 2¹⁰ = 12112008367 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 (12112009321) 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, 2306186 + ... + 2311431.

It is an arithmetic number, because the mean of its divisors is an integer number (1574607738).

Almost surely, 2^12112009391 is an apocalyptic number.

12112009391 is a deficient number, since it is larger than the sum of its proper divisors (484852513).

12112009391 is an equidigital number, since it uses as much as digits as its factorization.

12112009391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4617721.

The product of its (nonzero) digits is 972, while the sum is 29.

The spelling of 12112009391 in words is "twelve billion, one hundred twelve million, nine thousand, three hundred ninety-one".