18211059582271 has 2 divisors, whose sum is σ = 18211059582272. Its totient is φ = 18211059582270.

The previous prime is 18211059582257. The next prime is 18211059582281. The reversal of 18211059582271 is 17228595011281.

It is a strong prime.

It is an emirp because it is prime and its reverse (17228595011281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18211059582271 - 2⁵ = 18211059582239 is a prime.

It is a super-2 number, since 2×18211059582271² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18211059582281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9105529791135 + 9105529791136.

It is an arithmetic number, because the mean of its divisors is an integer number (9105529791136).

Almost surely, 2^{18211059582271} is an apocalyptic number.

18211059582271 is a deficient number, since it is larger than the sum of its proper divisors (1).

18211059582271 is an equidigital number, since it uses as much as digits as its factorization.

18211059582271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 806400, while the sum is 52.

The spelling of 18211059582271 in words is "eighteen trillion, two hundred eleven billion, fifty-nine million, five hundred eighty-two thousand, two hundred seventy-one".