12181018 has 8 divisors (see below), whose sum is σ = 18717300. Its totient is φ = 5941920.

The previous prime is 12180983. The next prime is 12181031. The reversal of 12181018 is 81018121.

It can be written as a sum of positive squares in 2 ways, for example, as 12131289 + 49729 = 3483^2 + 223^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 12181018.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74193 + ... + 74356.

Almost surely, 2^12181018 is an apocalyptic number.

12181018 is a deficient number, since it is larger than the sum of its proper divisors (6536282).

12181018 is a wasteful number, since it uses less digits than its factorization.

12181018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148592.

The product of its (nonzero) digits is 128, while the sum is 22.

The square root of 12181018 is about 3490.1315161466. The cubic root of 12181018 is about 230.0882962817.

Adding to 12181018 its reverse (81018121), we get a palindrome (93199139).

The spelling of 12181018 in words is "twelve million, one hundred eighty-one thousand, eighteen".