11131230231 has 12 divisors (see below), whose sum is σ = 17540120520. Its totient is φ = 6746200080.

The previous prime is 11131230193. The next prime is 11131230251. The reversal of 11131230231 is 13203213111.

11131230231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11131230231 - 2³³ = 2541295639 is a prime.

It is a super-2 number, since 2×11131230231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131230251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56218236 + ... + 56218433.

It is an arithmetic number, because the mean of its divisors is an integer number (1461676710).

Almost surely, 2^11131230231 is an apocalyptic number.

11131230231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11131230231 is a deficient number, since it is larger than the sum of its proper divisors (6408890289).

11131230231 is a wasteful number, since it uses less digits than its factorization.

11131230231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112436686 (or 112436683 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 11131230231 its reverse (13203213111), we get a palindrome (24334443342).

The spelling of 11131230231 in words is "eleven billion, one hundred thirty-one million, two hundred thirty thousand, two hundred thirty-one".