11331131233231 has 2 divisors, whose sum is σ = 11331131233232. Its totient is φ = 11331131233230.

The previous prime is 11331131233217. The next prime is 11331131233291. The reversal of 11331131233231 is 13233213113311.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11331131233231 - 2³³ = 11322541298639 is a prime.

It is a super-2 number, since 2×11331131233231² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11331131233231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11331131233211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5665565616615 + 5665565616616.

It is an arithmetic number, because the mean of its divisors is an integer number (5665565616616).

Almost surely, 2^{11331131233231} is an apocalyptic number.

11331131233231 is a deficient number, since it is larger than the sum of its proper divisors (1).

11331131233231 is an equidigital number, since it uses as much as digits as its factorization.

11331131233231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2916, while the sum is 28.

Adding to 11331131233231 its reverse (13233213113311), we get a palindrome (24564344346542).

The spelling of 11331131233231 in words is "eleven trillion, three hundred thirty-one billion, one hundred thirty-one million, two hundred thirty-three thousand, two hundred thirty-one".