22221122111 has 4 divisors (see below), whose sum is σ = 22228604424. Its totient is φ = 22213639800.

The previous prime is 22221122107. The next prime is 22221122123. The reversal of 22221122111 is 11122112222.

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 22221122111 - 2² = 22221122107 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 22221122111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221122141) 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, 3736700 + ... + 3742641.

It is an arithmetic number, because the mean of its divisors is an integer number (5557151106).

Almost surely, 2^22221122111 is an apocalyptic number.

22221122111 is a deficient number, since it is larger than the sum of its proper divisors (7482313).

22221122111 is an equidigital number, since it uses as much as digits as its factorization.

22221122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7482312.

The product of its digits is 64, while the sum is 17.

Adding to 22221122111 its reverse (11122112222), we get a palindrome (33343234333).

The spelling of 22221122111 in words is "twenty-two billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred eleven".