21102112222110 has 64 divisors (see below), whose sum is σ = 56382854241600. Its totient is φ = 5616174427776.

The previous prime is 21102112222039. The next prime is 21102112222117. The reversal of 21102112222110 is 1122221120112.

21102112222110 is a `hidden beast` number, since 21 + 1 + 0 + 211 + 222 + 211 + 0 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102112222117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76636609 + ... + 76911468.

It is an arithmetic number, because the mean of its divisors is an integer number (880982097525).

Almost surely, 2^{21102112222110} is an apocalyptic number.

21102112222110 is an abundant number, since it is smaller than the sum of its proper divisors (35280742019490).

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

21102112222110 is a wasteful number, since it uses less digits than its factorization.

21102112222110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153548602 (or 153548596 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21102112222110 its reverse (1122221120112), we get a palindrome (22224333342222).

The spelling of 21102112222110 in words is "twenty-one trillion, one hundred two billion, one hundred twelve million, two hundred twenty-two thousand, one hundred ten".