11223122111 has 4 divisors (see below), whose sum is σ = 11280092472. Its totient is φ = 11166151752.

The previous prime is 11223122089. The next prime is 11223122117. The reversal of 11223122111 is 11122132211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11122132211 = 2003 ⋅5552737.

It is a cyclic number.

It is not a de Polignac number, because 11223122111 - 2⁶ = 11223122047 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 11223122111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11223122117) 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, 28484885 + ... + 28485278.

It is an arithmetic number, because the mean of its divisors is an integer number (2820023118).

Almost surely, 2^11223122111 is an apocalyptic number.

11223122111 is a deficient number, since it is larger than the sum of its proper divisors (56970361).

11223122111 is an equidigital number, since it uses as much as digits as its factorization.

11223122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56970360.

The product of its digits is 48, while the sum is 17.

Adding to 11223122111 its reverse (11122132211), we get a palindrome (22345254322).

The spelling of 11223122111 in words is "eleven billion, two hundred twenty-three million, one hundred twenty-two thousand, one hundred eleven".