9999900199999 has 2 divisors, whose sum is σ = 9999900200000. Its totient is φ = 9999900199998.

The previous prime is 9999900199987. The next prime is 9999900200051. The reversal of 9999900199999 is 9999910099999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9999900199999 - 2¹⁷ = 9999900068927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999900199199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999950099999 + 4999950100000.

It is an arithmetic number, because the mean of its divisors is an integer number (4999950100000).

Almost surely, 2^{9999900199999} is an apocalyptic number.

9999900199999 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999900199999 is an equidigital number, since it uses as much as digits as its factorization.

9999900199999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3486784401, while the sum is 91.

The spelling of 9999900199999 in words is "nine trillion, nine hundred ninety-nine billion, nine hundred million, one hundred ninety-nine thousand, nine hundred ninety-nine".