21222323112 has 64 divisors (see below), whose sum is σ = 53376681600. Its totient is φ = 7031439360.

The previous prime is 21222323081. The next prime is 21222323119. The reversal of 21222323112 is 21132322212.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (21222323119) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3334189 + ... + 3340547.

It is an arithmetic number, because the mean of its divisors is an integer number (834010650).

Almost surely, 2^21222323112 is an apocalyptic number.

It is an amenable number.

21222323112 is an abundant number, since it is smaller than the sum of its proper divisors (32154358488).

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

21222323112 is a wasteful number, since it uses less digits than its factorization.

21222323112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7186 (or 7182 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

Adding to 21222323112 its reverse (21132322212), we get a palindrome (42354645324).

The spelling of 21222323112 in words is "twenty-one billion, two hundred twenty-two million, three hundred twenty-three thousand, one hundred twelve".