221065988862671 has 2 divisors, whose sum is σ = 221065988862672. Its totient is φ = 221065988862670.

The previous prime is 221065988862637. The next prime is 221065988862689. The reversal of 221065988862671 is 176268889560122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221065988862671 is a prime.

It is a super-2 number, since 2×221065988862671² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221065988862595 and 221065988862604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221065988862371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110532994431335 + 110532994431336.

It is an arithmetic number, because the mean of its divisors is an integer number (110532994431336).

Almost surely, 2^{221065988862671} is an apocalyptic number.

221065988862671 is a deficient number, since it is larger than the sum of its proper divisors (1).

221065988862671 is an equidigital number, since it uses as much as digits as its factorization.

221065988862671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 278691840, while the sum is 71.

The spelling of 221065988862671 in words is "two hundred twenty-one trillion, sixty-five billion, nine hundred eighty-eight million, eight hundred sixty-two thousand, six hundred seventy-one".