221112200 has 48 divisors (see below), whose sum is σ = 544334580. Its totient is φ = 83240960.

The previous prime is 221112191. The next prime is 221112239. The reversal of 221112200 is 2211122.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 167909764 + 53202436 = 12958^2 + 7294^2 .

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29117 + ... + 35916.

Almost surely, 2^221112200 is an apocalyptic number.

221112200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221112200 is an abundant number, since it is smaller than the sum of its proper divisors (323222380).

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

221112200 is a wasteful number, since it uses less digits than its factorization.

221112200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65066 (or 65057 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 221112200 is about 14869.8419628455. The cubic root of 221112200 is about 604.6966582597.

Adding to 221112200 its reverse (2211122), we get a palindrome (223323322).

Multiplying 221112200 by its reverse (2211122), we get a square (488906049888400 = 22111220²).

221112200 divided by its reverse (2211122) gives a square (100 = 10²).

The spelling of 221112200 in words is "two hundred twenty-one million, one hundred twelve thousand, two hundred".