1321313303311 has 2 divisors, whose sum is σ = 1321313303312. Its totient is φ = 1321313303310.

The previous prime is 1321313303309. The next prime is 1321313303363. The reversal of 1321313303311 is 1133033131231.

It is a weak prime.

It is an emirp because it is prime and its reverse (1133033131231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1321313303311 - 2¹ = 1321313303309 is a prime.

Together with 1321313303309, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321313303111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660656651655 + 660656651656.

It is an arithmetic number, because the mean of its divisors is an integer number (660656651656).

Almost surely, 2^{1321313303311} is an apocalyptic number.

1321313303311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321313303311 is an equidigital number, since it uses as much as digits as its factorization.

1321313303311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 25.

Adding to 1321313303311 its reverse (1133033131231), we get a palindrome (2454346434542).

The spelling of 1321313303311 in words is "one trillion, three hundred twenty-one billion, three hundred thirteen million, three hundred three thousand, three hundred eleven".