8622401100821 has 2 divisors, whose sum is σ = 8622401100822. Its totient is φ = 8622401100820.

The previous prime is 8622401100811. The next prime is 8622401100823. The reversal of 8622401100821 is 1280011042268.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8547495432100 + 74905668721 = 2923610^2 + 273689^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8622401100821 is a prime.

It is a Sophie Germain prime.

Together with 8622401100823, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8622401100823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4311200550410 + 4311200550411.

It is an arithmetic number, because the mean of its divisors is an integer number (4311200550411).

Almost surely, 2^{8622401100821} is an apocalyptic number.

It is an amenable number.

8622401100821 is a deficient number, since it is larger than the sum of its proper divisors (1).

8622401100821 is an equidigital number, since it uses as much as digits as its factorization.

8622401100821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12288, while the sum is 35.

The spelling of 8622401100821 in words is "eight trillion, six hundred twenty-two billion, four hundred one million, one hundred thousand, eight hundred twenty-one".