221111122222 has 16 divisors (see below), whose sum is σ = 336602851200. Its totient is φ = 108922315320.

The previous prime is 221111122213. The next prime is 221111122231. The reversal of 221111122222 is 222221111122.

It is an interprime number because it is at equal distance from previous prime (221111122213) and next prime (221111122231).

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 221111122222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2999322 + ... + 3072157.

It is an arithmetic number, because the mean of its divisors is an integer number (21037678200).

Almost surely, 2^221111122222 is an apocalyptic number.

221111122222 is a deficient number, since it is larger than the sum of its proper divisors (115491728978).

221111122222 is a wasteful number, since it uses less digits than its factorization.

221111122222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6071751.

The product of its digits is 128, while the sum is 19.

Adding to 221111122222 its reverse (222221111122), we get a palindrome (443332233344).

The spelling of 221111122222 in words is "two hundred twenty-one billion, one hundred eleven million, one hundred twenty-two thousand, two hundred twenty-two".