2211222222 has 48 divisors (see below), whose sum is σ = 5325164208. Its totient is φ = 657421440.

The previous prime is 2211222217. The next prime is 2211222227. The reversal of 2211222222 is 2222221122.

2211222222 is a `hidden beast` number, since 221 + 1 + 222 + 222 = 666.

It is an interprime number because it is at equal distance from previous prime (2211222217) and next prime (2211222227).

It is a Harshad number since it is a multiple of its sum of digits (18).

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

2211222222 is a modest number, since divided by 22222 gives 22112 as remainder.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 2211222195 and 2211222204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211222227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94863 + ... + 115850.

It is an arithmetic number, because the mean of its divisors is an integer number (110940921).

Almost surely, 2^2211222222 is an apocalyptic number.

2211222222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2211222222 is an abundant number, since it is smaller than the sum of its proper divisors (3113941986).

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

2211222222 is a wasteful number, since it uses less digits than its factorization.

2211222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210785 (or 210782 counting only the distinct ones).

The product of its digits is 256, while the sum is 18.

The square root of 2211222222 is about 47023.6347170229. The cubic root of 2211222222 is about 1302.7991405986.

Adding to 2211222222 its reverse (2222221122), we get a palindrome (4433443344).

The spelling of 2211222222 in words is "two billion, two hundred eleven million, two hundred twenty-two thousand, two hundred twenty-two".