12361331 has 4 divisors (see below), whose sum is σ = 12371664. Its totient is φ = 12351000.

The previous prime is 12361303. The next prime is 12361351. The reversal of 12361331 is 13316321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12361331 is a prime.

It is a super-2 number, since 2×12361331² = 305605008183122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12361351) 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, 3095 + ... + 5856.

It is an arithmetic number, because the mean of its divisors is an integer number (3092916).

Almost surely, 2^12361331 is an apocalyptic number.

12361331 is a deficient number, since it is larger than the sum of its proper divisors (10333).

12361331 is an equidigital number, since it uses as much as digits as its factorization.

12361331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10332.

The product of its digits is 324, while the sum is 20.

The square root of 12361331 is about 3515.8684560148. The cubic root of 12361331 is about 231.2180558749.

Adding to 12361331 its reverse (13316321), we get a palindrome (25677652).

The spelling of 12361331 in words is "twelve million, three hundred sixty-one thousand, three hundred thirty-one".