9909099909099 has 40 divisors (see below), whose sum is σ = 15699918670128. Its totient is φ = 6206881996800.

The previous prime is 9909099909001. The next prime is 9909099909131.

9909099909099 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9909099909099 - 2⁸ = 9909099908843 is a prime.

It is a super-2 number, since 2×9909099909099² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is not an unprimeable number, because it can be changed into a prime (9909099909299) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5321302 + ... + 6937899.

Almost surely, 2^{9909099909099} is an apocalyptic number.

9909099909099 is a deficient number, since it is larger than the sum of its proper divisors (5790818761029).

9909099909099 is a wasteful number, since it uses less digits than its factorization.

9909099909099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12259817 (or 12259808 counting only the distinct ones).

The product of its (nonzero) digits is 387420489, while the sum is 81.

The spelling of 9909099909099 in words is "nine trillion, nine hundred nine billion, ninety-nine million, nine hundred nine thousand, ninety-nine".