2222221200 has 60 divisors (see below), whose sum is σ = 7118519088. Its totient is φ = 592592000.

The previous prime is 2222221163. The next prime is 2222221201. The reversal of 2222221200 is 21222222.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2222221200.

It is not an unprimeable number, because it can be changed into a prime (2222221201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 924726 + ... + 927125.

Almost surely, 2^2222221200 is an apocalyptic number.

2222221200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2222221200 is an abundant number, since it is smaller than the sum of its proper divisors (4896297888).

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

2222221200 is a wasteful number, since it uses less digits than its factorization.

2222221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851872 (or 1851861 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 2222221200 is about 47140.4412367979. The cubic root of 2222221200 is about 1304.9556802964.

Adding to 2222221200 its reverse (21222222), we get a palindrome (2243443422).

The spelling of 2222221200 in words is "two billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred".