2221101200 has 60 divisors (see below), whose sum is σ = 5466387108. Its totient is φ = 866764800.

The previous prime is 2221101193. The next prime is 2221101203. The reversal of 2221101200 is 21011222.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3444736 + 2217656464 = 1856^2 + 47092^2 .

It is not an unprimeable number, because it can be changed into a prime (2221101203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51317 + ... + 84116.

Almost surely, 2^2221101200 is an apocalyptic number.

2221101200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221101200 is an abundant number, since it is smaller than the sum of its proper divisors (3245285908).

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

2221101200 is a wasteful number, since it uses less digits than its factorization.

2221101200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135492 (or 135481 counting only the distinct ones).

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

The square root of 2221101200 is about 47128.5603429598. The cubic root of 2221101200 is about 1304.7364107998.

Adding to 2221101200 its reverse (21011222), we get a palindrome (2242112422).

The spelling of 2221101200 in words is "two billion, two hundred twenty-one million, one hundred one thousand, two hundred".