111231310231 has 4 divisors (see below), whose sum is σ = 111939790072. Its totient is φ = 110522830392.

The previous prime is 111231310213. The next prime is 111231310313. The reversal of 111231310231 is 132013132111.

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 111231310231 - 2¹⁹ = 111230785943 is a prime.

It is a super-3 number, since 3×111231310231³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111231310199 and 111231310208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111231370231) 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, 354239685 + ... + 354239998.

It is an arithmetic number, because the mean of its divisors is an integer number (27984947518).

Almost surely, 2^111231310231 is an apocalyptic number.

111231310231 is a deficient number, since it is larger than the sum of its proper divisors (708479841).

111231310231 is an equidigital number, since it uses as much as digits as its factorization.

111231310231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708479840.

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

Adding to 111231310231 its reverse (132013132111), we get a palindrome (243244442342).

The spelling of 111231310231 in words is "one hundred eleven billion, two hundred thirty-one million, three hundred ten thousand, two hundred thirty-one".