12011331 has 8 divisors (see below), whose sum is σ = 16051984. Its totient is φ = 7989120.

The previous prime is 12011323. The next prime is 12011357. The reversal of 12011331 is 13311021.

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

It is not a de Polignac number, because 12011331 - 2³ = 12011323 is a prime.

It is a super-3 number, since 3×12011331³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12011371) 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 7 ways as a sum of consecutive naturals, for example, 3010 + ... + 5751.

It is an arithmetic number, because the mean of its divisors is an integer number (2006498).

Almost surely, 2^12011331 is an apocalyptic number.

12011331 is a deficient number, since it is larger than the sum of its proper divisors (4040653).

12011331 is an equidigital number, since it uses as much as digits as its factorization.

12011331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9221.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 12011331 is about 3465.7367182174. The cubic root of 12011331 is about 229.0148856033.

Adding to 12011331 its reverse (13311021), we get a palindrome (25322352).

The spelling of 12011331 in words is "twelve million, eleven thousand, three hundred thirty-one".