12105981227 has 4 divisors (see below), whose sum is σ = 12115598040. Its totient is φ = 12096364416.

The previous prime is 12105981193. The next prime is 12105981247. The reversal of 12105981227 is 72218950121.

12105981227 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12105981227 - 2¹⁸ = 12105719083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12105981247) 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 3 ways as a sum of consecutive naturals, for example, 4806518 + ... + 4809035.

It is an arithmetic number, because the mean of its divisors is an integer number (3028899510).

Almost surely, 2^12105981227 is an apocalyptic number.

12105981227 is a deficient number, since it is larger than the sum of its proper divisors (9616813).

12105981227 is an equidigital number, since it uses as much as digits as its factorization.

12105981227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9616812.

The product of its (nonzero) digits is 20160, while the sum is 38.

The spelling of 12105981227 in words is "twelve billion, one hundred five million, nine hundred eighty-one thousand, two hundred twenty-seven".