12131313 has 4 divisors (see below), whose sum is σ = 16175088. Its totient is φ = 8087540.

The previous prime is 12131303. The next prime is 12131321. The reversal of 12131313 is 31313121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12131313 - 2⁴ = 12131297 is a prime.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 12131292 and 12131301.

It is not an unprimeable number, because it can be changed into a prime (12131303) 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, 2021883 + ... + 2021888.

It is an arithmetic number, because the mean of its divisors is an integer number (4043772).

Almost surely, 2^12131313 is an apocalyptic number.

It is an amenable number.

12131313 is a deficient number, since it is larger than the sum of its proper divisors (4043775).

12131313 is an equidigital number, since it uses as much as digits as its factorization.

12131313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4043774.

The product of its digits is 54, while the sum is 15.

The square root of 12131313 is about 3483.0034453041. The cubic root of 12131313 is about 229.7749089596.

Adding to 12131313 its reverse (31313121), we get a palindrome (43444434).

It can be divided in two parts, 121 and 31313, that multiplied together give a palindrome (3788873).

The spelling of 12131313 in words is "twelve million, one hundred thirty-one thousand, three hundred thirteen".