12118561242 has 32 divisors (see below), whose sum is σ = 24339864960. Its totient is φ = 4022430720.

The previous prime is 12118561229. The next prime is 12118561243. The reversal of 12118561242 is 24216581121.

It is a super-2 number, since 2×12118561242² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12118561243) 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, 1635498 + ... + 1642890.

It is an arithmetic number, because the mean of its divisors is an integer number (760620780).

Almost surely, 2^12118561242 is an apocalyptic number.

12118561242 is an abundant number, since it is smaller than the sum of its proper divisors (12221303718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12118561242 is a wasteful number, since it uses less digits than its factorization.

12118561242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8518.

The product of its digits is 7680, while the sum is 33.

The spelling of 12118561242 in words is "twelve billion, one hundred eighteen million, five hundred sixty-one thousand, two hundred forty-two".