9999909099999 has 36 divisors (see below), whose sum is σ = 18095073619896. Its totient is φ = 5274677324448.

The previous prime is 9999909099979. The next prime is 9999909100019.

9999909099999 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (9999909099979) and next prime (9999909100019).

It is not a de Polignac number, because 9999909099999 - 2²⁵ = 9999875545567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999909099979) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 872130069 + ... + 872141534.

It is an arithmetic number, because the mean of its divisors is an integer number (502640933886).

Almost surely, 2^{9999909099999} is an apocalyptic number.

9999909099999 is a deficient number, since it is larger than the sum of its proper divisors (8095164519897).

9999909099999 is a wasteful number, since it uses less digits than its factorization.

9999909099999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744271636 (or 1744271626 counting only the distinct ones).

The product of its (nonzero) digits is 31381059609, while the sum is 99.

The spelling of 9999909099999 in words is "nine trillion, nine hundred ninety-nine billion, nine hundred nine million, ninety-nine thousand, nine hundred ninety-nine".