21210120033313 has 2 divisors, whose sum is σ = 21210120033314. Its totient is φ = 21210120033312.

The previous prime is 21210120033259. The next prime is 21210120033371. The reversal of 21210120033313 is 31333002101212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15023593056784 + 6186526976529 = 3876028^2 + 2487273^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21210120033313 is a prime.

It is not a weakly prime, because it can be changed into another prime (21210120033413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605060016656 + 10605060016657.

It is an arithmetic number, because the mean of its divisors is an integer number (10605060016657).

Almost surely, 2^{21210120033313} is an apocalyptic number.

It is an amenable number.

21210120033313 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210120033313 is an equidigital number, since it uses as much as digits as its factorization.

21210120033313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21210120033313 its reverse (31333002101212), we get a palindrome (52543122134525).

The spelling of 21210120033313 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty million, thirty-three thousand, three hundred thirteen".