9909999999099 has 24 divisors (see below), whose sum is σ = 15069360680400. Its totient is φ = 6258314145600.

The previous prime is 9909999999083. The next prime is 9909999999103.

9909999999099 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9909999999099 - 2⁴ = 9909999999083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9909999999079) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1233564 + ... + 4619705.

It is an arithmetic number, because the mean of its divisors is an integer number (627890028350).

Almost surely, 2^{9909999999099} is an apocalyptic number.

9909999999099 is a deficient number, since it is larger than the sum of its proper divisors (5159360681301).

9909999999099 is a wasteful number, since it uses less digits than its factorization.

9909999999099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5863195 (or 5863192 counting only the distinct ones).

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

The spelling of 9909999999099 in words is "nine trillion, nine hundred nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, ninety-nine".