13331212313 has 4 divisors (see below), whose sum is σ = 13331490660. Its totient is φ = 13330933968.

The previous prime is 13331212277. The next prime is 13331212319. The reversal of 13331212313 is 31321213331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31321213331 = 29 ⋅1080041839.

It can be written as a sum of positive squares in 2 ways, for example, as 12196330969 + 1134881344 = 110437^2 + 33688^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13331212313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13331212319) 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, 46970 + ... + 169907.

It is an arithmetic number, because the mean of its divisors is an integer number (3332872665).

Almost surely, 2^13331212313 is an apocalyptic number.

It is an amenable number.

13331212313 is a deficient number, since it is larger than the sum of its proper divisors (278347).

13331212313 is an equidigital number, since it uses as much as digits as its factorization.

13331212313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278346.

The product of its digits is 972, while the sum is 23.

Adding to 13331212313 its reverse (31321213331), we get a palindrome (44652425644).

The spelling of 13331212313 in words is "thirteen billion, three hundred thirty-one million, two hundred twelve thousand, three hundred thirteen".