21190475256271 has 2 divisors, whose sum is σ = 21190475256272. Its totient is φ = 21190475256270.

The previous prime is 21190475256263. The next prime is 21190475256319. The reversal of 21190475256271 is 17265257409112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21190475256271 - 2³ = 21190475256263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21190475251271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10595237628135 + 10595237628136.

It is an arithmetic number, because the mean of its divisors is an integer number (10595237628136).

Almost surely, 2^{21190475256271} is an apocalyptic number.

21190475256271 is a deficient number, since it is larger than the sum of its proper divisors (1).

21190475256271 is an equidigital number, since it uses as much as digits as its factorization.

21190475256271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2116800, while the sum is 52.

The spelling of 21190475256271 in words is "twenty-one trillion, one hundred ninety billion, four hundred seventy-five million, two hundred fifty-six thousand, two hundred seventy-one".