12116131805 has 8 divisors (see below), whose sum is σ = 14614692792. Its totient is φ = 9642682368.

The previous prime is 12116131799. The next prime is 12116131817. The reversal of 12116131805 is 50813161121.

It can be written as a sum of positive squares in 4 ways, for example, as 2738533561 + 9377598244 = 52331^2 + 96838^2 .

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 12116131805 - 2⁴ = 12116131789 is a prime.

It is a super-2 number, since 2×12116131805² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6276824 + ... + 6278753.

It is an arithmetic number, because the mean of its divisors is an integer number (1826836599).

Almost surely, 2^12116131805 is an apocalyptic number.

It is an amenable number.

12116131805 is a deficient number, since it is larger than the sum of its proper divisors (2498560987).

12116131805 is a wasteful number, since it uses less digits than its factorization.

12116131805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12555775.

The product of its (nonzero) digits is 1440, while the sum is 29.

Adding to 12116131805 its reverse (50813161121), we get a palindrome (62929292926).

The spelling of 12116131805 in words is "twelve billion, one hundred sixteen million, one hundred thirty-one thousand, eight hundred five".