21302010071 has 2 divisors, whose sum is σ = 21302010072. Its totient is φ = 21302010070.

The previous prime is 21302010049. The next prime is 21302010077. The reversal of 21302010071 is 17001020312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21302010071 - 2³⁴ = 4122140887 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21302010077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651005035 + 10651005036.

It is an arithmetic number, because the mean of its divisors is an integer number (10651005036).

Almost surely, 2^21302010071 is an apocalyptic number.

21302010071 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302010071 is an equidigital number, since it uses as much as digits as its factorization.

21302010071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 17.

Adding to 21302010071 its reverse (17001020312), we get a palindrome (38303030383).

The spelling of 21302010071 in words is "twenty-one billion, three hundred two million, ten thousand, seventy-one".