2001222222 has 8 divisors (see below), whose sum is σ = 4002444456. Its totient is φ = 667074072.

The previous prime is 2001222221. The next prime is 2001222257. The reversal of 2001222222 is 2222221002.

2001222222 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

2001222222 is an admirable number.

2001222222 is a modest number, since divided by 22222 gives 20012 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001222221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166768513 + ... + 166768524.

It is an arithmetic number, because the mean of its divisors is an integer number (500305557).

Almost surely, 2^2001222222 is an apocalyptic number.

2001222222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2001222222 is a wasteful number, since it uses less digits than its factorization.

2001222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333537042.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 2001222222 is about 44735.0223203253. The cubic root of 2001222222 is about 1260.1776481695.

Adding to 2001222222 its reverse (2222221002), we get a palindrome (4223443224).

The spelling of 2001222222 in words is "two billion, one million, two hundred twenty-two thousand, two hundred twenty-two".