8100221651 has 2 divisors, whose sum is σ = 8100221652. Its totient is φ = 8100221650.

The previous prime is 8100221617. The next prime is 8100221653. The reversal of 8100221651 is 1561220018.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8100221651 - 2⁶ = 8100221587 is a prime.

It is a super-2 number, since 2×8100221651² (a number of 21 digits) contains 22 as substring.

Together with 8100221653, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8100221651.

It is not a weakly prime, because it can be changed into another prime (8100221653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4050110825 + 4050110826.

It is an arithmetic number, because the mean of its divisors is an integer number (4050110826).

Almost surely, 2^8100221651 is an apocalyptic number.

8100221651 is a deficient number, since it is larger than the sum of its proper divisors (1).

8100221651 is an equidigital number, since it uses as much as digits as its factorization.

8100221651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 8100221651 is about 90001.2313860205. The cubic root of 8100221651 is about 2008.3171686575.

Adding to 8100221651 its reverse (1561220018), we get a palindrome (9661441669).

The spelling of 8100221651 in words is "eight billion, one hundred million, two hundred twenty-one thousand, six hundred fifty-one".