111321331 has 6 divisors (see below), whose sum is σ = 122361596. Its totient is φ = 101201100.

The previous prime is 111321319. The next prime is 111321383. The reversal of 111321331 is 133123111.

It is not a de Polignac number, because 111321331 - 2⁵ = 111321299 is a prime.

It is a super-2 number, since 2×111321331² = 24784877471223122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111321391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 459885 + ... + 460126.

Almost surely, 2^111321331 is an apocalyptic number.

111321331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111321331 is a deficient number, since it is larger than the sum of its proper divisors (11040265).

111321331 is an equidigital number, since it uses as much as digits as its factorization.

111321331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920033 (or 920022 counting only the distinct ones).

The product of its digits is 54, while the sum is 16.

The square root of 111321331 is about 10550.8924267097. The cubic root of 111321331 is about 481.0528553049.

Adding to 111321331 its reverse (133123111), we get a palindrome (244444442).

The spelling of 111321331 in words is "one hundred eleven million, three hundred twenty-one thousand, three hundred thirty-one".