2222221111111 has 4 divisors (see below), whose sum is σ = 2222330005224. Its totient is φ = 2222112217000.

The previous prime is 2222221111057. The next prime is 2222221111241. The reversal of 2222221111111 is 1111111222222.

It is a happy number.

2222221111111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2222221111111 - 2⁷ = 2222221110983 is a prime.

It is a Duffinian number.

2222221111111 is a modest number, since divided by 1111111 gives 222222 as remainder.

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 (2222221115111) 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, 54416440 + ... + 54457261.

It is an arithmetic number, because the mean of its divisors is an integer number (555582501306).

Almost surely, 2^{2222221111111} is an apocalyptic number.

2222221111111 is the 666667-th centered decagonal number.

2222221111111 is a deficient number, since it is larger than the sum of its proper divisors (108894113).

2222221111111 is a wasteful number, since it uses less digits than its factorization.

2222221111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108894112.

The product of its digits is 64, while the sum is 19.

Adding to 2222221111111 its reverse (1111111222222), we get a palindrome (3333332333333).

It can be divided in two parts, 2222221 and 111111, that added together give a palindrome (2333332).

The spelling of 2222221111111 in words is "two trillion, two hundred twenty-two billion, two hundred twenty-one million, one hundred eleven thousand, one hundred eleven".