22112211221200 has 30 divisors (see below), whose sum is σ = 53124587459894. Its totient is φ = 8844884488320.

The previous prime is 22112211221197. The next prime is 22112211221201. The reversal of 22112211221200 is 212211221122.

It can be written as a sum of positive squares in 3 ways, for example, as 26008657984 + 22086202563216 = 161272^2 + 4699596^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112211221201) 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 5 ways as a sum of consecutive naturals, for example, 27640263627 + ... + 27640264426.

Almost surely, 2^{22112211221200} is an apocalyptic number.

22112211221200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22112211221200 is an abundant number, since it is smaller than the sum of its proper divisors (31012376238694).

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

22112211221200 is a wasteful number, since it uses less digits than its factorization.

22112211221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55280528071 (or 55280528060 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22112211221200 its reverse (212211221122), we get a palindrome (22324422442322).

The spelling of 22112211221200 in words is "twenty-two trillion, one hundred twelve billion, two hundred eleven million, two hundred twenty-one thousand, two hundred".