111320231 has 4 divisors (see below), whose sum is σ = 121440264. Its totient is φ = 101200200.

The previous prime is 111320203. The next prime is 111320239. The reversal of 111320231 is 132023111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111320231 is a prime.

It is a super-2 number, since 2×111320231² = 24784387659786722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111320239) 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, 5060000 + ... + 5060021.

It is an arithmetic number, because the mean of its divisors is an integer number (30360066).

Almost surely, 2^111320231 is an apocalyptic number.

111320231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111320231 is a deficient number, since it is larger than the sum of its proper divisors (10120033).

111320231 is a wasteful number, since it uses less digits than its factorization.

111320231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10120032.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 111320231 is about 10550.8402982890. The cubic root of 111320231 is about 481.0512708230.

Adding to 111320231 its reverse (132023111), we get a palindrome (243343342).

It can be divided in two parts, 11 and 1320231, that multiplied together give a palindrome (14522541).

The spelling of 111320231 in words is "one hundred eleven million, three hundred twenty thousand, two hundred thirty-one".