1313122213021 has 2 divisors, whose sum is σ = 1313122213022. Its totient is φ = 1313122213020.

The previous prime is 1313122212977. The next prime is 1313122213043. The reversal of 1313122213021 is 1203122213131.

It is an a-pointer prime, because the next prime (1313122213043) can be obtained adding 1313122213021 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1054295650521 + 258826562500 = 1026789^2 + 508750^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313122213021 - 2¹¹ = 1313122210973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1313122212983 and 1313122213001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313122213061) 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, 656561106510 + 656561106511.

It is an arithmetic number, because the mean of its divisors is an integer number (656561106511).

Almost surely, 2^{1313122213021} is an apocalyptic number.

It is an amenable number.

1313122213021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313122213021 is an equidigital number, since it uses as much as digits as its factorization.

1313122213021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1313122213021 its reverse (1203122213131), we get a palindrome (2516244426152).

The spelling of 1313122213021 in words is "one trillion, three hundred thirteen billion, one hundred twenty-two million, two hundred thirteen thousand, twenty-one".