222111000 has 384 divisors, whose sum is σ = 832291200. Its totient is φ = 53222400.

The previous prime is 222110989. The next prime is 222111011. The reversal of 222111000 is 111222.

It is an interprime number because it is at equal distance from previous prime (222110989) and next prime (222111011).

It is a super-3 number, since 3×222111000³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

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

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6002982 + ... + 6003018.

It is an arithmetic number, because the mean of its divisors is an integer number (2167425).

Almost surely, 2^222111000 is an apocalyptic number.

222111000 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 222111000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (416145600).

222111000 is an abundant number, since it is smaller than the sum of its proper divisors (610180200).

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

222111000 is a wasteful number, since it uses less digits than its factorization.

222111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 222111000 is about 14903.3888763596. The cubic root of 222111000 is about 605.6057953186.

Adding to 222111000 its reverse (111222), we get a palindrome (222222222).

The spelling of 222111000 in words is "two hundred twenty-two million, one hundred eleven thousand".