11131331211 has 96 divisors (see below), whose sum is σ = 21704417280. Its totient is φ = 5308934400.

The previous prime is 11131331207. The next prime is 11131331219. The reversal of 11131331211 is 11213313111.

11131331211 is a `hidden beast` number, since 111 + 313 + 31 + 211 = 666.

It is not a de Polignac number, because 11131331211 - 2² = 11131331207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11131331219) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1717485 + ... + 1723953.

It is an arithmetic number, because the mean of its divisors is an integer number (226087680).

Almost surely, 2^11131331211 is an apocalyptic number.

11131331211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11131331211 is a deficient number, since it is larger than the sum of its proper divisors (10573086069).

11131331211 is a wasteful number, since it uses less digits than its factorization.

11131331211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6697 (or 6694 counting only the distinct ones).

The product of its digits is 54, while the sum is 18.

Adding to 11131331211 its reverse (11213313111), we get a palindrome (22344644322).

The spelling of 11131331211 in words is "eleven billion, one hundred thirty-one million, three hundred thirty-one thousand, two hundred eleven".