12110111998 has 4 divisors (see below), whose sum is σ = 18165168000. Its totient is φ = 6055055998.

The previous prime is 12110111977. The next prime is 12110112011. The reversal of 12110111998 is 89911101121.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3027527998 + ... + 3027528001.

It is an arithmetic number, because the mean of its divisors is an integer number (4541292000).

Almost surely, 2^12110111998 is an apocalyptic number.

12110111998 is a deficient number, since it is larger than the sum of its proper divisors (6055056002).

12110111998 is an equidigital number, since it uses as much as digits as its factorization.

12110111998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6055056001.

The product of its (nonzero) digits is 1296, while the sum is 34.

The spelling of 12110111998 in words is "twelve billion, one hundred ten million, one hundred eleven thousand, nine hundred ninety-eight".