12118038551 has 4 divisors (see below), whose sum is σ = 12123013512. Its totient is φ = 12113063592.

The previous prime is 12118038523. The next prime is 12118038553. The reversal of 12118038551 is 15583081121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12118038551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12118038553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2483825 + ... + 2488698.

It is an arithmetic number, because the mean of its divisors is an integer number (3030753378).

Almost surely, 2^12118038551 is an apocalyptic number.

12118038551 is a deficient number, since it is larger than the sum of its proper divisors (4974961).

12118038551 is an equidigital number, since it uses as much as digits as its factorization.

12118038551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4974960.

The product of its (nonzero) digits is 9600, while the sum is 35.

The spelling of 12118038551 in words is "twelve billion, one hundred eighteen million, thirty-eight thousand, five hundred fifty-one".