2101320424321 has 2 divisors, whose sum is σ = 2101320424322. Its totient is φ = 2101320424320.

The previous prime is 2101320424297. The next prime is 2101320424331. The reversal of 2101320424321 is 1234240231012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2046616360000 + 54704064321 = 1430600^2 + 233889^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101320424321 - 2¹⁹ = 2101319900033 is a prime.

It is a super-2 number, since 2×2101320424321² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2101320424331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050660212160 + 1050660212161.

It is an arithmetic number, because the mean of its divisors is an integer number (1050660212161).

Almost surely, 2^{2101320424321} is an apocalyptic number.

It is an amenable number.

2101320424321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101320424321 is an equidigital number, since it uses as much as digits as its factorization.

2101320424321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 2101320424321 its reverse (1234240231012), we get a palindrome (3335560655333).

The spelling of 2101320424321 in words is "two trillion, one hundred one billion, three hundred twenty million, four hundred twenty-four thousand, three hundred twenty-one".