11115311211 has 8 divisors (see below), whose sum is σ = 16467127760. Its totient is φ = 7410207456.

The previous prime is 11115311203. The next prime is 11115311213. The reversal of 11115311211 is 11211351111.

11115311211 is a `hidden beast` number, since 1 + 1 + 11 + 531 + 121 + 1 = 666.

It is not a de Polignac number, because 11115311211 - 2³ = 11115311203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11115311213) 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, 205839070 + ... + 205839123.

It is an arithmetic number, because the mean of its divisors is an integer number (2058390970).

Almost surely, 2^11115311211 is an apocalyptic number.

11115311211 is a deficient number, since it is larger than the sum of its proper divisors (5351816549).

11115311211 is an equidigital number, since it uses as much as digits as its factorization.

11115311211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411678202 (or 411678196 counting only the distinct ones).

The product of its digits is 30, while the sum is 18.

Adding to 11115311211 its reverse (11211351111), we get a palindrome (22326662322).

The spelling of 11115311211 in words is "eleven billion, one hundred fifteen million, three hundred eleven thousand, two hundred eleven".