11112331231 has 16 divisors (see below), whose sum is σ = 12074378400. Its totient is φ = 10187394048.

The previous prime is 11112331211. The next prime is 11112331261. The reversal of 11112331231 is 13213321111.

It is a cyclic number.

It is not a de Polignac number, because 11112331231 - 2⁵ = 11112331199 is a prime.

It is a super-2 number, since 2×11112331231² (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 = 11112331199 and 11112331208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112331211) 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, 80875 + ... + 169603.

It is an arithmetic number, because the mean of its divisors is an integer number (754648650).

Almost surely, 2^11112331231 is an apocalyptic number.

11112331231 is a deficient number, since it is larger than the sum of its proper divisors (962047169).

11112331231 is a wasteful number, since it uses less digits than its factorization.

11112331231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88938.

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

Adding to 11112331231 its reverse (13213321111), we get a palindrome (24325652342).

The spelling of 11112331231 in words is "eleven billion, one hundred twelve million, three hundred thirty-one thousand, two hundred thirty-one".