21100243021110 has 96 divisors (see below), whose sum is σ = 59851123637760. Its totient is φ = 5114940206400.

The previous prime is 21100243021097. The next prime is 21100243021159. The reversal of 21100243021110 is 1112034200112.

21100243021110 is a `hidden beast` number, since 2 + 1 + 10 + 0 + 2 + 430 + 211 + 10 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18513075 + ... + 19619745.

It is an arithmetic number, because the mean of its divisors is an integer number (623449204560).

Almost surely, 2^{21100243021110} is an apocalyptic number.

21100243021110 is an abundant number, since it is smaller than the sum of its proper divisors (38750880616650).

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

21100243021110 is a wasteful number, since it uses less digits than its factorization.

21100243021110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125954 (or 1125951 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21100243021110 its reverse (1112034200112), we get a palindrome (22212277221222).

The spelling of 21100243021110 in words is "twenty-one trillion, one hundred billion, two hundred forty-three million, twenty-one thousand, one hundred ten".