9999120001 has 8 divisors (see below), whose sum is σ = 10769915520. Its totient is φ = 9228557712.

The previous prime is 9999119983. The next prime is 9999120013. The reversal of 9999120001 is 1000219999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9999120001 - 2¹³ = 9999111809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9999121001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36456 + ... + 146038.

It is an arithmetic number, because the mean of its divisors is an integer number (1346239440).

Almost surely, 2^9999120001 is an apocalyptic number.

It is an amenable number.

9999120001 is a deficient number, since it is larger than the sum of its proper divisors (770795519).

9999120001 is a wasteful number, since it uses less digits than its factorization.

9999120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116615.

The product of its (nonzero) digits is 13122, while the sum is 40.

The square root of 9999120001 is about 99995.5999081960. The cubic root of 9999120001 is about 2154.3714914989.

The spelling of 9999120001 in words is "nine billion, nine hundred ninety-nine million, one hundred twenty thousand, one".