12111998 has 8 divisors (see below), whose sum is σ = 18307080. Its totient is φ = 6009640.

The previous prime is 12111997. The next prime is 12112013. The reversal of 12111998 is 89911121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22853 + ... + 23376.

It is an arithmetic number, because the mean of its divisors is an integer number (2288385).

Almost surely, 2^12111998 is an apocalyptic number.

12111998 is a deficient number, since it is larger than the sum of its proper divisors (6195082).

12111998 is a wasteful number, since it uses less digits than its factorization.

12111998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46362.

The product of its digits is 1296, while the sum is 32.

The square root of 12111998 is about 3480.2295901276. The cubic root of 12111998 is about 229.6528979884.

The spelling of 12111998 in words is "twelve million, one hundred eleven thousand, nine hundred ninety-eight".