21102112110 has 64 divisors (see below), whose sum is σ = 51009235200. Its totient is φ = 5586900480.

The previous prime is 21102112093. The next prime is 21102112133. The reversal of 21102112110 is 1121120112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2737041 + ... + 2744739.

It is an arithmetic number, because the mean of its divisors is an integer number (797019300).

Almost surely, 2^21102112110 is an apocalyptic number.

21102112110 is an abundant number, since it is smaller than the sum of its proper divisors (29907123090).

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

21102112110 is a wasteful number, since it uses less digits than its factorization.

21102112110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8353.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21102112110 its reverse (1121120112), we get a palindrome (22223232222).

The spelling of 21102112110 in words is "twenty-one billion, one hundred two million, one hundred twelve thousand, one hundred ten".