1313020302821 has 2 divisors, whose sum is σ = 1313020302822. Its totient is φ = 1313020302820.

The previous prime is 1313020302751. The next prime is 1313020302829. The reversal of 1313020302821 is 1282030203131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 887637201025 + 425383101796 = 942145^2 + 652214^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313020302821 - 2¹⁴ = 1313020286437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313020302829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656510151410 + 656510151411.

It is an arithmetic number, because the mean of its divisors is an integer number (656510151411).

Almost surely, 2^{1313020302821} is an apocalyptic number.

It is an amenable number.

1313020302821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313020302821 is an equidigital number, since it uses as much as digits as its factorization.

1313020302821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 1313020302821 its reverse (1282030203131), we get a palindrome (2595050505952).

The spelling of 1313020302821 in words is "one trillion, three hundred thirteen billion, twenty million, three hundred two thousand, eight hundred twenty-one".