12181017 has 4 divisors (see below), whose sum is σ = 16241360. Its totient is φ = 8120676.

The previous prime is 12180983. The next prime is 12181031. The reversal of 12181017 is 71018121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-12181017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12180984 and 12181002.

It is not an unprimeable number, because it can be changed into a prime (12181087) 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, 2030167 + ... + 2030172.

It is an arithmetic number, because the mean of its divisors is an integer number (4060340).

Almost surely, 2^12181017 is an apocalyptic number.

It is an amenable number.

12181017 is a deficient number, since it is larger than the sum of its proper divisors (4060343).

12181017 is an equidigital number, since it uses as much as digits as its factorization.

12181017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4060342.

The product of its (nonzero) digits is 112, while the sum is 21.

The square root of 12181017 is about 3490.1313728856. The cubic root of 12181017 is about 230.0882899854.

Adding to 12181017 its reverse (71018121), we get a palindrome (83199138).

The spelling of 12181017 in words is "twelve million, one hundred eighty-one thousand, seventeen".