11223220211 has 4 divisors (see below), whose sum is σ = 12826537392. Its totient is φ = 9619903032.

The previous prime is 11223220199. The next prime is 11223220271. The reversal of 11223220211 is 11202232211.

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 11223220211 - 2¹⁰ = 11223219187 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11223220211.

It is not an unprimeable number, because it can be changed into a prime (11223220271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 801658580 + ... + 801658593.

It is an arithmetic number, because the mean of its divisors is an integer number (3206634348).

Almost surely, 2^11223220211 is an apocalyptic number.

11223220211 is a deficient number, since it is larger than the sum of its proper divisors (1603317181).

11223220211 is an equidigital number, since it uses as much as digits as its factorization.

11223220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603317180.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 11223220211 its reverse (11202232211), we get a palindrome (22425452422).

The spelling of 11223220211 in words is "eleven billion, two hundred twenty-three million, two hundred twenty thousand, two hundred eleven".