22200221221020 has 72 divisors (see below), whose sum is σ = 69512950765440. Its totient is φ = 5729089345920.

The previous prime is 22200221221019. The next prime is 22200221221027. The reversal of 22200221221020 is 2012212200222.

22200221221020 is a `hidden beast` number, since 2 + 2 + 200 + 221 + 221 + 0 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22200221220984 and 22200221221002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22200221221027) 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, 1989261555 + ... + 1989272714.

It is an arithmetic number, because the mean of its divisors is an integer number (965457649520).

Almost surely, 2^{22200221221020} is an apocalyptic number.

22200221221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22200221221020 is an abundant number, since it is smaller than the sum of its proper divisors (47312729544420).

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

22200221221020 is a wasteful number, since it uses less digits than its factorization.

22200221221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3978534315 (or 3978534310 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22200221221020 its reverse (2012212200222), we get a palindrome (24212433421242).

The spelling of 22200221221020 in words is "twenty-two trillion, two hundred billion, two hundred twenty-one million, two hundred twenty-one thousand, twenty".