111013231 has 4 divisors (see below), whose sum is σ = 126872272. Its totient is φ = 95154192.

The previous prime is 111013223. The next prime is 111013261. The reversal of 111013231 is 132310111.

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

It is not a de Polignac number, because 111013231 - 2³ = 111013223 is a prime.

It is a super-2 number, since 2×111013231² = 24647874914118722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111013261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7929510 + ... + 7929523.

It is an arithmetic number, because the mean of its divisors is an integer number (31718068).

Almost surely, 2^111013231 is an apocalyptic number.

111013231 is a deficient number, since it is larger than the sum of its proper divisors (15859041).

111013231 is an equidigital number, since it uses as much as digits as its factorization.

111013231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15859040.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 111013231 is about 10536.2816496143. The cubic root of 111013231 is about 480.6086477482.

Adding to 111013231 its reverse (132310111), we get a palindrome (243323342).

It can be divided in two parts, 1110 and 13231, that added together give a palindrome (14341).

The spelling of 111013231 in words is "one hundred eleven million, thirteen thousand, two hundred thirty-one".