111201231 has 16 divisors (see below), whose sum is σ = 151086560. Its totient is φ = 72731520.

The previous prime is 111201229. The next prime is 111201239. The reversal of 111201231 is 132102111.

It is not a de Polignac number, because 111201231 - 2¹ = 111201229 is a prime.

It is a super-2 number, since 2×111201231² = 24731427551830722, 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 (111201239) 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, 133725 + ... + 134553.

It is an arithmetic number, because the mean of its divisors is an integer number (9442910).

Almost surely, 2^111201231 is an apocalyptic number.

111201231 is a deficient number, since it is larger than the sum of its proper divisors (39885329).

111201231 is an equidigital number, since it uses as much as digits as its factorization.

111201231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1626.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 111201231 is about 10545.1994291241. The cubic root of 111201231 is about 480.8797970159.

Adding to 111201231 its reverse (132102111), we get a palindrome (243303342).

The spelling of 111201231 in words is "one hundred eleven million, two hundred one thousand, two hundred thirty-one".