12156265105 has 4 divisors (see below), whose sum is σ = 14587518132. Its totient is φ = 9725012080.

The previous prime is 12156265061. The next prime is 12156265139. The reversal of 12156265105 is 50156265121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3927779584 + 8228485521 = 62672^2 + 90711^2 .

It is not a de Polignac number, because 12156265105 - 2¹¹ = 12156263057 is a prime.

It is a super-2 number, since 2×12156265105² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1215626506 + ... + 1215626515.

It is an arithmetic number, because the mean of its divisors is an integer number (3646879533).

Almost surely, 2^12156265105 is an apocalyptic number.

It is an amenable number.

12156265105 is a deficient number, since it is larger than the sum of its proper divisors (2431253027).

12156265105 is an equidigital number, since it uses as much as digits as its factorization.

12156265105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431253026.

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 12156265105 in words is "twelve billion, one hundred fifty-six million, two hundred sixty-five thousand, one hundred five".