1313221132313 has 4 divisors (see below), whose sum is σ = 1313223435648. Its totient is φ = 1313218828980.

The previous prime is 1313221132303. The next prime is 1313221132337. The reversal of 1313221132313 is 3132311223131.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1313221132313 - 2¹⁰ = 1313221131289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313221132303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404048 + ... + 1670238.

It is an arithmetic number, because the mean of its divisors is an integer number (328305858912).

Almost surely, 2^{1313221132313} is an apocalyptic number.

It is an amenable number.

1313221132313 is a deficient number, since it is larger than the sum of its proper divisors (2303335).

1313221132313 is a wasteful number, since it uses less digits than its factorization.

1313221132313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2303334.

The product of its digits is 1944, while the sum is 26.

Adding to 1313221132313 its reverse (3132311223131), we get a palindrome (4445532355444).

The spelling of 1313221132313 in words is "one trillion, three hundred thirteen billion, two hundred twenty-one million, one hundred thirty-two thousand, three hundred thirteen".