111101231 has 4 divisors (see below), whose sum is σ = 111949464. Its totient is φ = 110253000.

The previous prime is 111101173. The next prime is 111101311. The reversal of 111101231 is 132101111.

It is a happy number.

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 111101231 - 2⁶ = 111101167 is a prime.

It is a super-2 number, since 2×111101231² = 24686967059430722, 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 (111101831) 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, 423920 + ... + 424181.

It is an arithmetic number, because the mean of its divisors is an integer number (27987366).

Almost surely, 2^111101231 is an apocalyptic number.

111101231 is a deficient number, since it is larger than the sum of its proper divisors (848233).

111101231 is an equidigital number, since it uses as much as digits as its factorization.

111101231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848232.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 111101231 is about 10540.4568686561. The cubic root of 111101231 is about 480.7356067607.

Adding to 111101231 its reverse (132101111), we get a palindrome (243202342).

The spelling of 111101231 in words is "one hundred eleven million, one hundred one thousand, two hundred thirty-one".