11321131211 has 16 divisors (see below), whose sum is σ = 12590027520. Its totient is φ = 10109352960.

The previous prime is 11321131207. The next prime is 11321131253. The reversal of 11321131211 is 11213112311.

It is not a de Polignac number, because 11321131211 - 2² = 11321131207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11321131211.

It is not an unprimeable number, because it can be changed into a prime (11321131271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2096531 + ... + 2101923.

It is an arithmetic number, because the mean of its divisors is an integer number (786876720).

Almost surely, 2^11321131211 is an apocalyptic number.

11321131211 is a deficient number, since it is larger than the sum of its proper divisors (1268896309).

11321131211 is a wasteful number, since it uses less digits than its factorization.

11321131211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10646.

The product of its digits is 36, while the sum is 17.

Adding to 11321131211 its reverse (11213112311), we get a palindrome (22534243522).

The spelling of 11321131211 in words is "eleven billion, three hundred twenty-one million, one hundred thirty-one thousand, two hundred eleven".