8121008551 has 2 divisors, whose sum is σ = 8121008552. Its totient is φ = 8121008550.

The previous prime is 8121008549. The next prime is 8121008569. The reversal of 8121008551 is 1558001218.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8121008551 - 2¹ = 8121008549 is a prime.

Together with 8121008549, 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 (8121008501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4060504275 + 4060504276.

It is an arithmetic number, because the mean of its divisors is an integer number (4060504276).

Almost surely, 2^8121008551 is an apocalyptic number.

8121008551 is a deficient number, since it is larger than the sum of its proper divisors (1).

8121008551 is an equidigital number, since it uses as much as digits as its factorization.

8121008551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3200, while the sum is 31.

The square root of 8121008551 is about 90116.6385913279. The cubic root of 8121008551 is about 2010.0336249253.

Adding to 8121008551 its reverse (1558001218), we get a palindrome (9679009769).

The spelling of 8121008551 in words is "eight billion, one hundred twenty-one million, eight thousand, five hundred fifty-one".