21063212748439 has 2 divisors, whose sum is σ = 21063212748440. Its totient is φ = 21063212748438.

The previous prime is 21063212748437. The next prime is 21063212748443. The reversal of 21063212748439 is 93484721236012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21063212748439 - 2¹ = 21063212748437 is a prime.

Together with 21063212748437, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21063212748437) 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, 10531606374219 + 10531606374220.

It is an arithmetic number, because the mean of its divisors is an integer number (10531606374220).

Almost surely, 2^{21063212748439} is an apocalyptic number.

21063212748439 is a deficient number, since it is larger than the sum of its proper divisors (1).

21063212748439 is an equidigital number, since it uses as much as digits as its factorization.

21063212748439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3483648, while the sum is 52.

The spelling of 21063212748439 in words is "twenty-one trillion, sixty-three billion, two hundred twelve million, seven hundred forty-eight thousand, four hundred thirty-nine".