12313121 has 4 divisors (see below), whose sum is σ = 12961200. Its totient is φ = 11665044.

The previous prime is 12313111. The next prime is 12313141. The reversal of 12313121 is 12131321.

12313121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-12313121 is a prime.

It is a super-2 number, since 2×12313121² = 303225897521282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12313096 and 12313105.

It is not an unprimeable number, because it can be changed into a prime (12313111) 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, 324011 + ... + 324048.

It is an arithmetic number, because the mean of its divisors is an integer number (3240300).

Almost surely, 2^12313121 is an apocalyptic number.

It is an amenable number.

12313121 is a deficient number, since it is larger than the sum of its proper divisors (648079).

12313121 is an equidigital number, since it uses as much as digits as its factorization.

12313121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648078.

The product of its digits is 36, while the sum is 14.

The square root of 12313121 is about 3509.0056996249. The cubic root of 12313121 is about 230.9170757370.

Adding to 12313121 its reverse (12131321), we get a palindrome (24444442).

The spelling of 12313121 in words is "twelve million, three hundred thirteen thousand, one hundred twenty-one".