2222221111 has 8 divisors (see below), whose sum is σ = 2425275648. Its totient is φ = 2019339000.

The previous prime is 2222221087. The next prime is 2222221121. The reversal of 2222221111 is 1111222222.

It is a happy number.

2222221111 is digitally balanced in base 2, 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.

It is a cyclic number.

It is not a de Polignac number, because 2222221111 - 2¹⁵ = 2222188343 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222221121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15375 + ... + 68416.

It is an arithmetic number, because the mean of its divisors is an integer number (303159456).

Almost surely, 2^2222221111 is an apocalyptic number.

2222221111 is a deficient number, since it is larger than the sum of its proper divisors (203054537).

2222221111 is a wasteful number, since it uses less digits than its factorization.

2222221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86213.

The product of its digits is 64, while the sum is 16.

The square root of 2222221111 is about 47140.4402928102. The cubic root of 2222221111 is about 1304.9556628752.

Adding to 2222221111 its reverse (1111222222), we get a palindrome (3333443333).

It can be divided in two parts, 22222211 and 11, that added together give a palindrome (22222222).

The spelling of 2222221111 in words is "two billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred eleven".