22221122222120 has 64 divisors (see below), whose sum is σ = 50083131978000. Its totient is φ = 8873234104320.

The previous prime is 22221122222119. The next prime is 22221122222129. The reversal of 22221122222120 is 2122222112222.

It can be written as a sum of positive squares in 8 ways, for example, as 21575114589604 + 646007632516 = 4644902^2 + 803746^2 .

It is not an unprimeable number, because it can be changed into a prime (22221122222129) 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 15 ways as a sum of consecutive naturals, for example, 178110002 + ... + 178234718.

Almost surely, 2^{22221122222120} is an apocalyptic number.

22221122222120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221122222120 is an abundant number, since it is smaller than the sum of its proper divisors (27862009755880).

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

22221122222120 is a wasteful number, since it uses less digits than its factorization.

22221122222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132318 (or 132314 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 22221122222120 its reverse (2122222112222), we get a palindrome (24343344334342).

The spelling of 22221122222120 in words is "twenty-two trillion, two hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty".