12231331 has 12 divisors (see below), whose sum is σ = 14848272. Its totient is φ = 10027248.

The previous prime is 12231311. The next prime is 12231367. The reversal of 12231331 is 13313221.

12231331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12231331 - 2⁷ = 12231203 is a prime.

It is a super-2 number, since 2×12231331² = 299210916063122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12231311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4300 + ... + 6553.

It is an arithmetic number, because the mean of its divisors is an integer number (1237356).

Almost surely, 2^12231331 is an apocalyptic number.

12231331 is a deficient number, since it is larger than the sum of its proper divisors (2616941).

12231331 is a wasteful number, since it uses less digits than its factorization.

12231331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10890 (or 10883 counting only the distinct ones).

The product of its digits is 108, while the sum is 16.

The square root of 12231331 is about 3497.3319830980. The cubic root of 12231331 is about 230.4046499813.

Adding to 12231331 its reverse (13313221), we get a palindrome (25544552).

The spelling of 12231331 in words is "twelve million, two hundred thirty-one thousand, three hundred thirty-one".