12117862147 has 4 divisors (see below), whose sum is σ = 12172202560. Its totient is φ = 12063521736.

The previous prime is 12117862117. The next prime is 12117862201. The reversal of 12117862147 is 74126871121.

It is a happy number.

12117862147 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, and also an emirpimes, since its reverse is a distinct semiprime: 74126871121 = 31 ⋅2391189391.

It is a cyclic number.

It is not a de Polignac number, because 12117862147 - 2³¹ = 9970378499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12117862117) 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, 27169872 + ... + 27170317.

It is an arithmetic number, because the mean of its divisors is an integer number (3043050640).

Almost surely, 2^12117862147 is an apocalyptic number.

12117862147 is a deficient number, since it is larger than the sum of its proper divisors (54340413).

12117862147 is an equidigital number, since it uses as much as digits as its factorization.

12117862147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54340412.

The product of its digits is 37632, while the sum is 40.

The spelling of 12117862147 in words is "twelve billion, one hundred seventeen million, eight hundred sixty-two thousand, one hundred forty-seven".