21222110110110 has 1024 divisors, whose sum is σ = 70839006658560. Its totient is φ = 3941498880000.

The previous prime is 21222110110109. The next prime is 21222110110127. The reversal of 21222110110110 is 1101101122212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21222110110110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 511 ways as a sum of consecutive naturals, for example, 13255533310 + ... + 13255534910.

It is an arithmetic number, because the mean of its divisors is an integer number (69178717440).

Almost surely, 2^{21222110110110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21222110110110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35419503329280).

21222110110110 is an abundant number, since it is smaller than the sum of its proper divisors (49616896548450).

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

21222110110110 is a wasteful number, since it uses less digits than its factorization.

21222110110110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1985.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21222110110110 its reverse (1101101122212), we get a palindrome (22323211232322).

The spelling of 21222110110110 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred ten million, one hundred ten thousand, one hundred ten".