11431440211 has 4 divisors (see below), whose sum is σ = 11437940800. Its totient is φ = 11424939624.

The previous prime is 11431440179. The next prime is 11431440217. The reversal of 11431440211 is 11204413411.

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 11431440211 - 2⁵ = 11431440179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11431440217) 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, 3247656 + ... + 3251173.

It is an arithmetic number, because the mean of its divisors is an integer number (2859485200).

Almost surely, 2^11431440211 is an apocalyptic number.

11431440211 is a deficient number, since it is larger than the sum of its proper divisors (6500589).

11431440211 is an equidigital number, since it uses as much as digits as its factorization.

11431440211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6500588.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 11431440211 its reverse (11204413411), we get a palindrome (22635853622).

The spelling of 11431440211 in words is "eleven billion, four hundred thirty-one million, four hundred forty thousand, two hundred eleven".