1122211111 has 8 divisors (see below), whose sum is σ = 1282811040. Its totient is φ = 961682208.

The previous prime is 1122211087. The next prime is 1122211121. The reversal of 1122211111 is 1111122211.

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 1122211111 - 2⁷ = 1122210983 is a prime.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 1122211091 and 1122211100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122211121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22065 + ... + 52261.

It is an arithmetic number, because the mean of its divisors is an integer number (160351380).

Almost surely, 2^1122211111 is an apocalyptic number.

1122211111 is a deficient number, since it is larger than the sum of its proper divisors (160599929).

1122211111 is an equidigital number, since it uses as much as digits as its factorization.

1122211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35513.

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

The square root of 1122211111 is about 33499.4195621357. The cubic root of 1122211111 is about 1039.1817747569.

Adding to 1122211111 its reverse (1111122211), we get a palindrome (2233333322).

Subtracting from 1122211111 its reverse (1111122211), we obtain a square (11088900 = 3330²).

It can be divided in two parts, 1122211 and 111, that multiplied together give a palindrome (124565421).

The spelling of 1122211111 in words is "one billion, one hundred twenty-two million, two hundred eleven thousand, one hundred eleven".