8221206495919 has 2 divisors, whose sum is σ = 8221206495920. Its totient is φ = 8221206495918.

The previous prime is 8221206495917. The next prime is 8221206495937. The reversal of 8221206495919 is 9195946021228.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8221206495919 - 2¹ = 8221206495917 is a prime.

It is a super-2 number, since 2×8221206495919² (a number of 27 digits) contains 22 as substring.

Together with 8221206495917, 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 (8221206495917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4110603247959 + 4110603247960.

It is an arithmetic number, because the mean of its divisors is an integer number (4110603247960).

Almost surely, 2^{8221206495919} is an apocalyptic number.

8221206495919 is a deficient number, since it is larger than the sum of its proper divisors (1).

8221206495919 is an equidigital number, since it uses as much as digits as its factorization.

8221206495919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5598720, while the sum is 58.

The spelling of 8221206495919 in words is "eight trillion, two hundred twenty-one billion, two hundred six million, four hundred ninety-five thousand, nine hundred nineteen".