11323111231 has 4 divisors (see below), whose sum is σ = 11324286000. Its totient is φ = 11321936464.

The previous prime is 11323111213. The next prime is 11323111271. The reversal of 11323111231 is 13211132311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11323111231 - 2¹³ = 11323103039 is a prime.

It is a super-2 number, since 2×11323111231² (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 = 11323111199 and 11323111208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11323111271) 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, 572806 + ... + 592243.

It is an arithmetic number, because the mean of its divisors is an integer number (2831071500).

Almost surely, 2^11323111231 is an apocalyptic number.

11323111231 is a deficient number, since it is larger than the sum of its proper divisors (1174769).

11323111231 is an equidigital number, since it uses as much as digits as its factorization.

11323111231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174768.

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

Adding to 11323111231 its reverse (13211132311), we get a palindrome (24534243542).

The spelling of 11323111231 in words is "eleven billion, three hundred twenty-three million, one hundred eleven thousand, two hundred thirty-one".