22221100221100 has 72 divisors (see below), whose sum is σ = 52609595770368. Its totient is φ = 8079449044800.

The previous prime is 22221100221097. The next prime is 22221100221107. The reversal of 22221100221100 is 112200112222.

It is a happy number.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (22221100221107) 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 23 ways as a sum of consecutive naturals, for example, 8195169 + ... + 10564231.

It is an arithmetic number, because the mean of its divisors is an integer number (730688830144).

Almost surely, 2^{22221100221100} is an apocalyptic number.

22221100221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221100221100 is an abundant number, since it is smaller than the sum of its proper divisors (30388495549268).

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

22221100221100 is a wasteful number, since it uses less digits than its factorization.

22221100221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2377615 (or 2377608 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22221100221100 its reverse (112200112222), we get a palindrome (22333300333322).

The spelling of 22221100221100 in words is "twenty-two trillion, two hundred twenty-one billion, one hundred million, two hundred twenty-one thousand, one hundred".