613310021021 has 2 divisors, whose sum is σ = 613310021022. Its totient is φ = 613310021020.

The previous prime is 613310020957. The next prime is 613310021033. The reversal of 613310021021 is 120120013316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 345802802500 + 267507218521 = 588050^2 + 517211^2 .

It is a cyclic number.

It is not a de Polignac number, because 613310021021 - 2⁶ = 613310020957 is a prime.

It is a super-2 number, since 2×613310021021² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 613310020984 and 613310021002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (613310029021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306655010510 + 306655010511.

It is an arithmetic number, because the mean of its divisors is an integer number (306655010511).

Almost surely, 2^613310021021 is an apocalyptic number.

It is an amenable number.

613310021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

613310021021 is an equidigital number, since it uses as much as digits as its factorization.

613310021021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 613310021021 its reverse (120120013316), we get a palindrome (733430034337).

The spelling of 613310021021 in words is "six hundred thirteen billion, three hundred ten million, twenty-one thousand, twenty-one".