12118217005 has 16 divisors (see below), whose sum is σ = 15325269120. Its totient is φ = 9173504448.

The previous prime is 12118216997. The next prime is 12118217009. The reversal of 12118217005 is 50071281121.

It is a cyclic number.

It is not a de Polignac number, because 12118217005 - 2³ = 12118216997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12118217009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6264 + ... + 155806.

It is an arithmetic number, because the mean of its divisors is an integer number (957829320).

Almost surely, 2^12118217005 is an apocalyptic number.

It is an amenable number.

12118217005 is a deficient number, since it is larger than the sum of its proper divisors (3207052115).

12118217005 is a wasteful number, since it uses less digits than its factorization.

12118217005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150420.

The product of its (nonzero) digits is 1120, while the sum is 28.

Adding to 12118217005 its reverse (50071281121), we get a palindrome (62189498126).

The spelling of 12118217005 in words is "twelve billion, one hundred eighteen million, two hundred seventeen thousand, five".