22101222111 has 4 divisors (see below), whose sum is σ = 29468296152. Its totient is φ = 14734148072.

The previous prime is 22101222107. The next prime is 22101222127. The reversal of 22101222111 is 11122210122.

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 22101222111 - 2² = 22101222107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22101222211) 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, 3683537016 + ... + 3683537021.

It is an arithmetic number, because the mean of its divisors is an integer number (7367074038).

Almost surely, 2^22101222111 is an apocalyptic number.

22101222111 is a deficient number, since it is larger than the sum of its proper divisors (7367074041).

22101222111 is an equidigital number, since it uses as much as digits as its factorization.

22101222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7367074040.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22101222111 its reverse (11122210122), we get a palindrome (33223432233).

The spelling of 22101222111 in words is "twenty-two billion, one hundred one million, two hundred twenty-two thousand, one hundred eleven".