222201100 has 36 divisors (see below), whose sum is σ = 526013208. Its totient is φ = 80800000.

The previous prime is 222201097. The next prime is 222201121. The reversal of 222201100 is 1102222.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

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, 99901 + ... + 102100.

It is an arithmetic number, because the mean of its divisors is an integer number (14611478).

Almost surely, 2^222201100 is an apocalyptic number.

222201100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222201100 is an abundant number, since it is smaller than the sum of its proper divisors (303812108).

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

222201100 is a wasteful number, since it uses less digits than its factorization.

222201100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202026 (or 202019 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 222201100 is about 14906.4113722921. The cubic root of 222201100 is about 605.6876728568.

Adding to 222201100 its reverse (1102222), we get a palindrome (223303322).

The spelling of 222201100 in words is "two hundred twenty-two million, two hundred one thousand, one hundred".