11220112111 has 16 divisors (see below), whose sum is σ = 12397025088. Its totient is φ = 10088812800.

The previous prime is 11220112091. The next prime is 11220112117. The reversal of 11220112111 is 11121102211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11220112111 - 2¹³ = 11220103919 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11220112091 and 11220112100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220112117) 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 15 ways as a sum of consecutive naturals, for example, 336390 + ... + 368236.

It is an arithmetic number, because the mean of its divisors is an integer number (774814068).

Almost surely, 2^11220112111 is an apocalyptic number.

11220112111 is a deficient number, since it is larger than the sum of its proper divisors (1176912977).

11220112111 is a wasteful number, since it uses less digits than its factorization.

11220112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32562.

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

Adding to 11220112111 its reverse (11121102211), we get a palindrome (22341214322).

The spelling of 11220112111 in words is "eleven billion, two hundred twenty million, one hundred twelve thousand, one hundred eleven".