11113231231 has 4 divisors (see below), whose sum is σ = 11114728600. Its totient is φ = 11111733864.

The previous prime is 11113231229. The next prime is 11113231243. The reversal of 11113231231 is 13213231111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13213231111 = 29 ⋅455628659.

It is a cyclic number.

It is not a de Polignac number, because 11113231231 - 2¹ = 11113231229 is a prime.

It is a super-2 number, since 2×11113231231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11113231199 and 11113231208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11113231331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 737496 + ... + 752413.

It is an arithmetic number, because the mean of its divisors is an integer number (2778682150).

Almost surely, 2^11113231231 is an apocalyptic number.

11113231231 is a deficient number, since it is larger than the sum of its proper divisors (1497369).

11113231231 is an equidigital number, since it uses as much as digits as its factorization.

11113231231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497368.

The product of its digits is 108, while the sum is 19.

Adding to 11113231231 its reverse (13213231111), we get a palindrome (24326462342).

The spelling of 11113231231 in words is "eleven billion, one hundred thirteen million, two hundred thirty-one thousand, two hundred thirty-one".