222211100 has 72 divisors (see below), whose sum is σ = 509634048. Its totient is φ = 83966400.

The previous prime is 222211081. The next prime is 222211117. The reversal of 222211100 is 1112222.

It is a happy number.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132467 + ... + 134133.

Almost surely, 2^222211100 is an apocalyptic number.

222211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222211100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254817024).

222211100 is an abundant number, since it is smaller than the sum of its proper divisors (287422948).

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

222211100 is a wasteful number, since it uses less digits than its factorization.

222211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755 (or 1748 counting only the distinct ones).

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

The square root of 222211100 is about 14906.7467946564. The cubic root of 222211100 is about 605.6967588993.

Adding to 222211100 its reverse (1112222), we get a palindrome (223323322).

It can be divided in two parts, 22 and 2211100, that added together give a palindrome (2211122).

The spelling of 222211100 in words is "two hundred twenty-two million, two hundred eleven thousand, one hundred".