12118281 has 16 divisors (see below), whose sum is σ = 18530304. Its totient is φ = 6900624.

The previous prime is 12118279. The next prime is 12118313. The reversal of 12118281 is 18281121.

It is not a de Polignac number, because 12118281 - 2¹ = 12118279 is a prime.

It is a super-2 number, since 2×12118281² = 293705468789922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12118481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6456 + ... + 8118.

It is an arithmetic number, because the mean of its divisors is an integer number (1158144).

Almost surely, 2^12118281 is an apocalyptic number.

It is an amenable number.

12118281 is a deficient number, since it is larger than the sum of its proper divisors (6412023).

12118281 is a wasteful number, since it uses less digits than its factorization.

12118281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020.

The product of its digits is 256, while the sum is 24.

The square root of 12118281 is about 3481.1321434269. The cubic root of 12118281 is about 229.6926013120.

The spelling of 12118281 in words is "twelve million, one hundred eighteen thousand, two hundred eighty-one".