21271707059 has 2 divisors, whose sum is σ = 21271707060. Its totient is φ = 21271707058.

The previous prime is 21271707047. The next prime is 21271707073. The reversal of 21271707059 is 95070717212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21271707059 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21271707019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10635853529 + 10635853530.

It is an arithmetic number, because the mean of its divisors is an integer number (10635853530).

Almost surely, 2^21271707059 is an apocalyptic number.

21271707059 is a deficient number, since it is larger than the sum of its proper divisors (1).

21271707059 is an equidigital number, since it uses as much as digits as its factorization.

21271707059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61740, while the sum is 41.

The spelling of 21271707059 in words is "twenty-one billion, two hundred seventy-one million, seven hundred seven thousand, fifty-nine".