21101102198 has 24 divisors (see below), whose sum is σ = 36095632776. Its totient is φ = 9174387200.

The previous prime is 21101102173. The next prime is 21101102203. The reversal of 21101102198 is 89120110112.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 894923 + ... + 918198.

It is an arithmetic number, because the mean of its divisors is an integer number (1503984699).

Almost surely, 2^21101102198 is an apocalyptic number.

21101102198 is a deficient number, since it is larger than the sum of its proper divisors (14994530578).

21101102198 is a wasteful number, since it uses less digits than its factorization.

21101102198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1813180 (or 1813157 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 26.

The spelling of 21101102198 in words is "twenty-one billion, one hundred one million, one hundred two thousand, one hundred ninety-eight".