211111198 has 8 divisors (see below), whose sum is σ = 316862208. Its totient is φ = 105490464.

The previous prime is 211111193. The next prime is 211111231. The reversal of 211111198 is 891111112.

211111198 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (211111193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28411 + ... + 35062.

It is an arithmetic number, because the mean of its divisors is an integer number (39607776).

Almost surely, 2^211111198 is an apocalyptic number.

211111198 is a deficient number, since it is larger than the sum of its proper divisors (105751010).

211111198 is a wasteful number, since it uses less digits than its factorization.

211111198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65138.

The product of its digits is 144, while the sum is 25.

The square root of 211111198 is about 14529.6661351870. Note that the first 3 decimals coincide. The cubic root of 211111198 is about 595.4387442593.

It can be divided in two parts, 2111111 and 98, that added together give a square (2111209 = 1453²).

The spelling of 211111198 in words is "two hundred eleven million, one hundred eleven thousand, one hundred ninety-eight".