12161343265 has 16 divisors (see below), whose sum is σ = 15231224448. Its totient is φ = 9304172416.

The previous prime is 12161343251. The next prime is 12161343301. The reversal of 12161343265 is 56234316121.

It is a cyclic number.

It is not a de Polignac number, because 12161343265 - 2²⁵ = 12127788833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12161343265.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 858117 + ... + 872173.

It is an arithmetic number, because the mean of its divisors is an integer number (951951528).

Almost surely, 2^12161343265 is an apocalyptic number.

It is an amenable number.

12161343265 is a deficient number, since it is larger than the sum of its proper divisors (3069881183).

12161343265 is a wasteful number, since it uses less digits than its factorization.

12161343265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21608.

The product of its digits is 25920, while the sum is 34.

Adding to 12161343265 its reverse (56234316121), we get a palindrome (68395659386).

The spelling of 12161343265 in words is "twelve billion, one hundred sixty-one million, three hundred forty-three thousand, two hundred sixty-five".