12188117 has 2 divisors, whose sum is σ = 12188118. Its totient is φ = 12188116.

The previous prime is 12188107. The next prime is 12188119. The reversal of 12188117 is 71188121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12117361 + 70756 = 3481^2 + 266^2 .

It is a cyclic number.

It is not a de Polignac number, because 12188117 - 2¹² = 12184021 is a prime.

Together with 12188119, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12188117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12188119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6094058 + 6094059.

It is an arithmetic number, because the mean of its divisors is an integer number (6094059).

Almost surely, 2^12188117 is an apocalyptic number.

It is an amenable number.

12188117 is a deficient number, since it is larger than the sum of its proper divisors (1).

12188117 is an equidigital number, since it uses as much as digits as its factorization.

12188117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 896, while the sum is 29.

The square root of 12188117 is about 3491.1483783993. The cubic root of 12188117 is about 230.1329854751.

The spelling of 12188117 in words is "twelve million, one hundred eighty-eight thousand, one hundred seventeen".