9901228832099 has 4 divisors (see below), whose sum is σ = 10801340544120. Its totient is φ = 9001117120080.

The previous prime is 9901228832087. The next prime is 9901228832141. The reversal of 9901228832099 is 9902388221099.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9901228832099 - 2³² = 9896933864803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9901228832059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450055855994 + ... + 450055856015.

It is an arithmetic number, because the mean of its divisors is an integer number (2700335136030).

Almost surely, 2^{9901228832099} is an apocalyptic number.

9901228832099 is a deficient number, since it is larger than the sum of its proper divisors (900111712021).

9901228832099 is a wasteful number, since it uses less digits than its factorization.

9901228832099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900111712020.

The product of its (nonzero) digits is 10077696, while the sum is 62.

The spelling of 9901228832099 in words is "nine trillion, nine hundred one billion, two hundred twenty-eight million, eight hundred thirty-two thousand, ninety-nine".