21008292879271 has 2 divisors, whose sum is σ = 21008292879272. Its totient is φ = 21008292879270.

The previous prime is 21008292879269. The next prime is 21008292879319. The reversal of 21008292879271 is 17297829280012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21008292879271 - 2¹ = 21008292879269 is a prime.

Together with 21008292879269, 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 (21008292874271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10504146439635 + 10504146439636.

It is an arithmetic number, because the mean of its divisors is an integer number (10504146439636).

Almost surely, 2^{21008292879271} is an apocalyptic number.

21008292879271 is a deficient number, since it is larger than the sum of its proper divisors (1).

21008292879271 is an equidigital number, since it uses as much as digits as its factorization.

21008292879271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4064256, while the sum is 58.

The spelling of 21008292879271 in words is "twenty-one trillion, eight billion, two hundred ninety-two million, eight hundred seventy-nine thousand, two hundred seventy-one".