22011221111 has 4 divisors (see below), whose sum is σ = 24012241224. Its totient is φ = 20010201000.

The previous prime is 22011221101. The next prime is 22011221143. The reversal of 22011221111 is 11112211022.

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 22011221111 - 2⁶ = 22011221047 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 (22011221101) 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, 1000510040 + ... + 1000510061.

It is an arithmetic number, because the mean of its divisors is an integer number (6003060306).

Almost surely, 2^22011221111 is an apocalyptic number.

22011221111 is a deficient number, since it is larger than the sum of its proper divisors (2001020113).

22011221111 is a wasteful number, since it uses less digits than its factorization.

22011221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001020112.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 22011221111 its reverse (11112211022), we get a palindrome (33123432133).

The spelling of 22011221111 in words is "twenty-two billion, eleven million, two hundred twenty-one thousand, one hundred eleven".