111001331 has 8 divisors (see below), whose sum is σ = 127144800. Its totient is φ = 94929408.

The previous prime is 111001321. The next prime is 111001333. The reversal of 111001331 is 133100111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111001331 - 2²² = 106807027 is a prime.

It is a super-2 number, since 2×111001331² = 24642590967543122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111001333) 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 7 ways as a sum of consecutive naturals, for example, 14516 + ... + 20801.

It is an arithmetic number, because the mean of its divisors is an integer number (15893100).

Almost surely, 2^111001331 is an apocalyptic number.

111001331 is a deficient number, since it is larger than the sum of its proper divisors (16143469).

111001331 is an equidigital number, since it uses as much as digits as its factorization.

111001331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35773.

The product of its (nonzero) digits is 9, while the sum is 11.

The square root of 111001331 is about 10535.7169191280. The cubic root of 111001331 is about 480.5914742779.

Adding to 111001331 its reverse (133100111), we get a palindrome (244101442).

The spelling of 111001331 in words is "one hundred eleven million, one thousand, three hundred thirty-one".