11223331211 has 4 divisors (see below), whose sum is σ = 11223627192. Its totient is φ = 11223035232.

The previous prime is 11223331187. The next prime is 11223331219. The reversal of 11223331211 is 11213332211.

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 11223331211 - 2¹⁰ = 11223330187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11223331219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81005 + ... + 170318.

It is an arithmetic number, because the mean of its divisors is an integer number (2805906798).

Almost surely, 2^11223331211 is an apocalyptic number.

11223331211 is a deficient number, since it is larger than the sum of its proper divisors (295981).

11223331211 is an equidigital number, since it uses as much as digits as its factorization.

11223331211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295980.

The product of its digits is 216, while the sum is 20.

Adding to 11223331211 its reverse (11213332211), we get a palindrome (22436663422).

It can be divided in two parts, 1122 and 3331211, that added together give a palindrome (3332333).

The spelling of 11223331211 in words is "eleven billion, two hundred twenty-three million, three hundred thirty-one thousand, two hundred eleven".