21308424410071 has 2 divisors, whose sum is σ = 21308424410072. Its totient is φ = 21308424410070.

The previous prime is 21308424410057. The next prime is 21308424410087. The reversal of 21308424410071 is 17001442480312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21308424410071 - 2¹³ = 21308424401879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21308424410071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21308424410671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10654212205035 + 10654212205036.

It is an arithmetic number, because the mean of its divisors is an integer number (10654212205036).

Almost surely, 2^{21308424410071} is an apocalyptic number.

21308424410071 is a deficient number, since it is larger than the sum of its proper divisors (1).

21308424410071 is an equidigital number, since it uses as much as digits as its factorization.

21308424410071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43008, while the sum is 37.

Adding to 21308424410071 its reverse (17001442480312), we get a palindrome (38309866890383).

The spelling of 21308424410071 in words is "twenty-one trillion, three hundred eight billion, four hundred twenty-four million, four hundred ten thousand, seventy-one".