11212121198 has 8 divisors (see below), whose sum is σ = 17703349320. Its totient is φ = 5311004760.

The previous prime is 11212121191. The next prime is 11212121209. The reversal of 11212121198 is 89112121211.

11212121198 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11212121198.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212121191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147527873 + ... + 147527948.

It is an arithmetic number, because the mean of its divisors is an integer number (2212918665).

Almost surely, 2^11212121198 is an apocalyptic number.

11212121198 is a deficient number, since it is larger than the sum of its proper divisors (6491228122).

11212121198 is a wasteful number, since it uses less digits than its factorization.

11212121198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295055842.

The product of its digits is 576, while the sum is 29.

The spelling of 11212121198 in words is "eleven billion, two hundred twelve million, one hundred twenty-one thousand, one hundred ninety-eight".