102111198 has 24 divisors (see below), whose sum is σ = 237565512. Its totient is φ = 29174544.

The previous prime is 102111193. The next prime is 102111199. The reversal of 102111198 is 891111201.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102111193) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173365 + ... + 173952.

It is an arithmetic number, because the mean of its divisors is an integer number (9898563).

Almost surely, 2^102111198 is an apocalyptic number.

102111198 is an abundant number, since it is smaller than the sum of its proper divisors (135454314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102111198 is a wasteful number, since it uses less digits than its factorization.

102111198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347336 (or 347329 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 24.

The square root of 102111198 is about 10105.0085601151. The cubic root of 102111198 is about 467.4025999344.

Adding to 102111198 its reverse (891111201), we get a palindrome (993222399).

The spelling of 102111198 in words is "one hundred two million, one hundred eleven thousand, one hundred ninety-eight".