8002120999 has 2 divisors, whose sum is σ = 8002121000. Its totient is φ = 8002120998.

The previous prime is 8002120993. The next prime is 8002121033. The reversal of 8002120999 is 9990212008.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8002120999 - 2⁵ = 8002120967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8002120993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4001060499 + 4001060500.

It is an arithmetic number, because the mean of its divisors is an integer number (4001060500).

Almost surely, 2^8002120999 is an apocalyptic number.

8002120999 is a deficient number, since it is larger than the sum of its proper divisors (1).

8002120999 is an equidigital number, since it uses as much as digits as its factorization.

8002120999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 8002120999 is about 89454.5750590768. The cubic root of 8002120999 is about 2000.1767342987.

The spelling of 8002120999 in words is "eight billion, two million, one hundred twenty thousand, nine hundred ninety-nine".