2101310020321 has 2 divisors, whose sum is σ = 2101310020322. Its totient is φ = 2101310020320.

The previous prime is 2101310020301. The next prime is 2101310020357. The reversal of 2101310020321 is 1230200131012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1546938937600 + 554371082721 = 1243760^2 + 744561^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101310020321 - 2³⁵ = 2066950281953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2101310020295 and 2101310020304.

It is not a weakly prime, because it can be changed into another prime (2101310020301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050655010160 + 1050655010161.

It is an arithmetic number, because the mean of its divisors is an integer number (1050655010161).

Almost surely, 2^{2101310020321} is an apocalyptic number.

It is an amenable number.

2101310020321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101310020321 is an equidigital number, since it uses as much as digits as its factorization.

2101310020321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 2101310020321 its reverse (1230200131012), we get a palindrome (3331510151333).

The spelling of 2101310020321 in words is "two trillion, one hundred one billion, three hundred ten million, twenty thousand, three hundred twenty-one".