111122221211 has 4 divisors (see below), whose sum is σ = 114706809024. Its totient is φ = 107537633400.

The previous prime is 111122221181. The next prime is 111122221253. The reversal of 111122221211 is 112122221111.

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 111122221211 - 2¹⁴ = 111122204827 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 111122221211.

It is not an unprimeable number, because it can be changed into a prime (111122221291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1792293860 + ... + 1792293921.

It is an arithmetic number, because the mean of its divisors is an integer number (28676702256).

Almost surely, 2^111122221211 is an apocalyptic number.

111122221211 is a deficient number, since it is larger than the sum of its proper divisors (3584587813).

111122221211 is an equidigital number, since it uses as much as digits as its factorization.

111122221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3584587812.

The product of its digits is 32, while the sum is 17.

Adding to 111122221211 its reverse (112122221111), we get a palindrome (223244442322).

The spelling of 111122221211 in words is "one hundred eleven billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred eleven".