21402312041329 has 2 divisors, whose sum is σ = 21402312041330. Its totient is φ = 21402312041328.

The previous prime is 21402312041311. The next prime is 21402312041333. The reversal of 21402312041329 is 92314021320412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20542105875600 + 860206165729 = 4532340^2 + 927473^2 .

It is a cyclic number.

It is not a de Polignac number, because 21402312041329 - 2¹¹ = 21402312039281 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21402312041294 and 21402312041303.

It is not a weakly prime, because it can be changed into another prime (21402312041339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10701156020664 + 10701156020665.

It is an arithmetic number, because the mean of its divisors is an integer number (10701156020665).

Almost surely, 2^{21402312041329} is an apocalyptic number.

It is an amenable number.

21402312041329 is a deficient number, since it is larger than the sum of its proper divisors (1).

21402312041329 is an equidigital number, since it uses as much as digits as its factorization.

21402312041329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 21402312041329 in words is "twenty-one trillion, four hundred two billion, three hundred twelve million, forty-one thousand, three hundred twenty-nine".