1321443310313 has 4 divisors (see below), whose sum is σ = 1510220926080. Its totient is φ = 1132665694548.

The previous prime is 1321443310303. The next prime is 1321443310373. The reversal of 1321443310313 is 3130133441231.

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 1321443310313 - 2¹² = 1321443306217 is a prime.

It is a super-2 number, since 2×1321443310313² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321443310303) 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, 94388807873 + ... + 94388807886.

It is an arithmetic number, because the mean of its divisors is an integer number (377555231520).

Almost surely, 2^{1321443310313} is an apocalyptic number.

It is an amenable number.

1321443310313 is a deficient number, since it is larger than the sum of its proper divisors (188777615767).

1321443310313 is an equidigital number, since it uses as much as digits as its factorization.

1321443310313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188777615766.

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 1321443310313 its reverse (3130133441231), we get a palindrome (4451576751544).

The spelling of 1321443310313 in words is "one trillion, three hundred twenty-one billion, four hundred forty-three million, three hundred ten thousand, three hundred thirteen".