99999900111001 has 48 divisors (see below), whose sum is σ = 117050544573120. Its totient is φ = 84701398400000.

The previous prime is 99999900110953. The next prime is 99999900111017. The reversal of 99999900111001 is 10011100999999.

It is a happy number.

It is not a de Polignac number, because 99999900111001 - 2⁹ = 99999900110489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99999900111091) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2536825470 + ... + 2536864888.

It is an arithmetic number, because the mean of its divisors is an integer number (2438553011940).

Almost surely, 2^{99999900111001} is an apocalyptic number.

It is an amenable number.

99999900111001 is a deficient number, since it is larger than the sum of its proper divisors (17050644462119).

99999900111001 is a wasteful number, since it uses less digits than its factorization.

99999900111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47466 (or 47449 counting only the distinct ones).

The product of its (nonzero) digits is 531441, while the sum is 58.

The spelling of 99999900111001 in words is "ninety-nine trillion, nine hundred ninety-nine billion, nine hundred million, one hundred eleven thousand, one".