12117287377 has 4 divisors (see below), whose sum is σ = 13049386420. Its totient is φ = 11185188336.

The previous prime is 12117287341. The next prime is 12117287393. The reversal of 12117287377 is 77378271121.

It is a happy number.

12117287377 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 can be written as a sum of positive squares in 2 ways, for example, as 6193060416 + 5924226961 = 78696^2 + 76969^2 .

It is a cyclic number.

It is not a de Polignac number, because 12117287377 - 2⁷ = 12117287249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12117287327) 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, 466049502 + ... + 466049527.

It is an arithmetic number, because the mean of its divisors is an integer number (3262346605).

Almost surely, 2^12117287377 is an apocalyptic number.

It is an amenable number.

12117287377 is a deficient number, since it is larger than the sum of its proper divisors (932099043).

12117287377 is an equidigital number, since it uses as much as digits as its factorization.

12117287377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932099042.

The product of its digits is 230496, while the sum is 46.

The spelling of 12117287377 in words is "twelve billion, one hundred seventeen million, two hundred eighty-seven thousand, three hundred seventy-seven".