2122222111 has 4 divisors (see below), whose sum is σ = 2124885672. Its totient is φ = 2119558552.

The previous prime is 2122222099. The next prime is 2122222127. The reversal of 2122222111 is 1112222212.

It is a happy number.

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 2122222111 - 2¹⁷ = 2122091039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122222171) 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, 1330585 + ... + 1332178.

It is an arithmetic number, because the mean of its divisors is an integer number (531221418).

Almost surely, 2^2122222111 is an apocalyptic number.

2122222111 is a deficient number, since it is larger than the sum of its proper divisors (2663561).

2122222111 is an equidigital number, since it uses as much as digits as its factorization.

2122222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2663560.

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

The square root of 2122222111 is about 46067.5819964539. The cubic root of 2122222111 is about 1285.0803365420.

Adding to 2122222111 its reverse (1112222212), we get a palindrome (3234444323).

It can be divided in two parts, 212222211 and 1, that added together give a palindrome (212222212).

The spelling of 2122222111 in words is "two billion, one hundred twenty-two million, two hundred twenty-two thousand, one hundred eleven".