21102110112 has 24 divisors (see below), whose sum is σ = 55393039296. Its totient is φ = 7034036672.

The previous prime is 21102110039. The next prime is 21102110123. The reversal of 21102110112 is 21101120112.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109906728 + ... + 109906919.

It is an arithmetic number, because the mean of its divisors is an integer number (2308043304).

Almost surely, 2^21102110112 is an apocalyptic number.

It is an amenable number.

21102110112 is an abundant number, since it is smaller than the sum of its proper divisors (34290929184).

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

21102110112 is a wasteful number, since it uses less digits than its factorization.

21102110112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219813660 (or 219813652 counting only the distinct ones).

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

Adding to 21102110112 its reverse (21101120112), we get a palindrome (42203230224).

The spelling of 21102110112 in words is "twenty-one billion, one hundred two million, one hundred ten thousand, one hundred twelve".