12111898 has 4 divisors (see below), whose sum is σ = 18167850. Its totient is φ = 6055948.

The previous prime is 12111893. The next prime is 12111899. The reversal of 12111898 is 89811121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12020089 + 91809 = 3467^2 + 303^2 .

It is a plaindrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (12111893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3027973 + ... + 3027976.

Almost surely, 2^12111898 is an apocalyptic number.

12111898 is a deficient number, since it is larger than the sum of its proper divisors (6055952).

12111898 is an equidigital number, since it uses as much as digits as its factorization.

12111898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6055951.

The product of its digits is 1152, while the sum is 31.

The square root of 12111898 is about 3480.2152232297. The cubic root of 12111898 is about 229.6522659607.

The spelling of 12111898 in words is "twelve million, one hundred eleven thousand, eight hundred ninety-eight".