2211222112200 has 72 divisors (see below), whose sum is σ = 7426020932850. Its totient is φ = 589659229440.

The previous prime is 2211222112163. The next prime is 2211222112223. The reversal of 2211222112200 is 22112221122.

It is a happy number.

2211222112200 is a `hidden beast` number, since 2 + 211 + 22 + 211 + 220 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 2156721342084 + 54500770116 = 1468578^2 + 233454^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 614226565 + ... + 614230164.

Almost surely, 2^{2211222112200} is an apocalyptic number.

2211222112200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211222112200 is an abundant number, since it is smaller than the sum of its proper divisors (5214798820650).

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

2211222112200 is a wasteful number, since it uses less digits than its factorization.

2211222112200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228456751 (or 1228456739 counting only the distinct ones).

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

Adding to 2211222112200 its reverse (22112221122), we get a palindrome (2233334333322).

2211222112200 divided by its reverse (22112221122) gives a square (100 = 10²).

The spelling of 2211222112200 in words is "two trillion, two hundred eleven billion, two hundred twenty-two million, one hundred twelve thousand, two hundred".