11331113231 has 16 divisors (see below), whose sum is σ = 12135225600. Its totient is φ = 10556597568.

The previous prime is 11331113221. The next prime is 11331113243. The reversal of 11331113231 is 13231113311.

It is a cyclic number.

It is not a de Polignac number, because 11331113231 - 2²² = 11326918927 is a prime.

It is a super-2 number, since 2×11331113231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331113221) 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, 95840 + ... + 178458.

It is an arithmetic number, because the mean of its divisors is an integer number (758451600).

Almost surely, 2^11331113231 is an apocalyptic number.

11331113231 is a deficient number, since it is larger than the sum of its proper divisors (804112369).

11331113231 is an equidigital number, since it uses as much as digits as its factorization.

11331113231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82798.

The product of its digits is 162, while the sum is 20.

Adding to 11331113231 its reverse (13231113311), we get a palindrome (24562226542).

The spelling of 11331113231 in words is "eleven billion, three hundred thirty-one million, one hundred thirteen thousand, two hundred thirty-one".