22105345212 has 144 divisors (see below), whose sum is σ = 59196533760. Its totient is φ = 6945523200.

The previous prime is 22105345193. The next prime is 22105345217. The reversal of 22105345212 is 21254350122.

22105345212 is a `hidden beast` number, since 2 + 2 + 105 + 34 + 521 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22105345217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7438887 + ... + 7441857.

It is an arithmetic number, because the mean of its divisors is an integer number (411087040).

Almost surely, 2^22105345212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22105345212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29598266880).

22105345212 is an abundant number, since it is smaller than the sum of its proper divisors (37091188548).

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

22105345212 is a wasteful number, since it uses less digits than its factorization.

22105345212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3184 (or 3179 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 22105345212 its reverse (21254350122), we get a palindrome (43359695334).

The spelling of 22105345212 in words is "twenty-two billion, one hundred five million, three hundred forty-five thousand, two hundred twelve".