9999011100001 has 64 divisors (see below), whose sum is σ = 12712924224000. Its totient is φ = 7638893568000.

The previous prime is 9999011099981. The next prime is 9999011100011. The reversal of 9999011100001 is 1000011109999.

It is a cyclic number.

It is not a de Polignac number, because 9999011100001 - 2⁵ = 9999011099969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9999011100011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2198065675 + ... + 2198070223.

It is an arithmetic number, because the mean of its divisors is an integer number (198639441000).

Almost surely, 2^{9999011100001} is an apocalyptic number.

It is an amenable number.

9999011100001 is a deficient number, since it is larger than the sum of its proper divisors (2713913123999).

9999011100001 is a wasteful number, since it uses less digits than its factorization.

9999011100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7370.

The product of its (nonzero) digits is 6561, while the sum is 40.

It can be divided in two parts, 999901 and 1100001, that added together give a palindrome (2099902).

The spelling of 9999011100001 in words is "nine trillion, nine hundred ninety-nine billion, eleven million, one hundred thousand, one".