21007112759587 has 2 divisors, whose sum is σ = 21007112759588. Its totient is φ = 21007112759586.

The previous prime is 21007112759579. The next prime is 21007112759683. The reversal of 21007112759587 is 78595721170012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21007112759587 - 2³ = 21007112759579 is a prime.

It is not a weakly prime, because it can be changed into another prime (21007112759887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10503556379793 + 10503556379794.

It is an arithmetic number, because the mean of its divisors is an integer number (10503556379794).

Almost surely, 2^{21007112759587} is an apocalyptic number.

21007112759587 is a deficient number, since it is larger than the sum of its proper divisors (1).

21007112759587 is an equidigital number, since it uses as much as digits as its factorization.

21007112759587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2469600, while the sum is 55.

The spelling of 21007112759587 in words is "twenty-one trillion, seven billion, one hundred twelve million, seven hundred fifty-nine thousand, five hundred eighty-seven".