12105691371 has 6 divisors (see below), whose sum is σ = 17485998660. Its totient is φ = 8070460908.

The previous prime is 12105691343. The next prime is 12105691373. The reversal of 12105691371 is 17319650121.

It is a happy number.

12105691371 is a `hidden beast` number, since 1 + 2 + 10 + 569 + 13 + 71 = 666.

12105691371 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12105691371 - 2²⁷ = 11971473643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12105691373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 672538401 + ... + 672538418.

It is an arithmetic number, because the mean of its divisors is an integer number (2914333110).

Almost surely, 2^12105691371 is an apocalyptic number.

12105691371 is a deficient number, since it is larger than the sum of its proper divisors (5380307289).

12105691371 is a wasteful number, since it uses less digits than its factorization.

12105691371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345076825 (or 1345076822 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The spelling of 12105691371 in words is "twelve billion, one hundred five million, six hundred ninety-one thousand, three hundred seventy-one".