11220211111 has 8 divisors (see below), whose sum is σ = 11262929600. Its totient is φ = 11177568000.

The previous prime is 11220211069. The next prime is 11220211117. The reversal of 11220211111 is 11111202211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11220211111 - 2³¹ = 9072727463 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11220211091 and 11220211100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220211117) 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 7 ways as a sum of consecutive naturals, for example, 288895 + ... + 325423.

It is an arithmetic number, because the mean of its divisors is an integer number (1407866200).

Almost surely, 2^11220211111 is an apocalyptic number.

11220211111 is a deficient number, since it is larger than the sum of its proper divisors (42718489).

11220211111 is an equidigital number, since it uses as much as digits as its factorization.

11220211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37689.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11220211111 its reverse (11111202211), we get a palindrome (22331413322).

The spelling of 11220211111 in words is "eleven billion, two hundred twenty million, two hundred eleven thousand, one hundred eleven".