22221201121200 has 90 divisors (see below), whose sum is σ = 77113740458924. Its totient is φ = 5925653631360.

The previous prime is 22221201121193. The next prime is 22221201121201. The reversal of 22221201121200 is 212110212222.

It is a happy number.

22221201121200 is a `hidden beast` number, since 2 + 222 + 120 + 1 + 121 + 200 = 666.

It is a tau number, because it is divible by the number of its divisors (90).

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

It is not an unprimeable number, because it can be changed into a prime (22221201121201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3086274334 + ... + 3086281533.

Almost surely, 2^{22221201121200} is an apocalyptic number.

22221201121200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221201121200 is an abundant number, since it is smaller than the sum of its proper divisors (54892539337724).

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

22221201121200 is a wasteful number, since it uses less digits than its factorization.

22221201121200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6172555891 (or 6172555877 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22221201121200 its reverse (212110212222), we get a palindrome (22433311333422).

The spelling of 22221201121200 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred one million, one hundred twenty-one thousand, two hundred".