21512360330339 has 2 divisors, whose sum is σ = 21512360330340. Its totient is φ = 21512360330338.

The previous prime is 21512360330207. The next prime is 21512360330341. The reversal of 21512360330339 is 93303306321512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21512360330339 - 2¹² = 21512360326243 is a prime.

Together with 21512360330341, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 21512360330296 and 21512360330305.

It is not a weakly prime, because it can be changed into another prime (21512360330389) 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, 10756180165169 + 10756180165170.

It is an arithmetic number, because the mean of its divisors is an integer number (10756180165170).

Almost surely, 2^{21512360330339} is an apocalyptic number.

21512360330339 is a deficient number, since it is larger than the sum of its proper divisors (1).

21512360330339 is an equidigital number, since it uses as much as digits as its factorization.

21512360330339 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 262440, while the sum is 41.

The spelling of 21512360330339 in words is "twenty-one trillion, five hundred twelve billion, three hundred sixty million, three hundred thirty thousand, three hundred thirty-nine".