9901099901 has 8 divisors (see below), whose sum is σ = 12344228544. Its totient is φ = 7715142720.

The previous prime is 9901099847. The next prime is 9901099907. The reversal of 9901099901 is 1099901099.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9901099901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9901099907) 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, 64292780 + ... + 64292933.

It is an arithmetic number, because the mean of its divisors is an integer number (1543028568).

Almost surely, 2^9901099901 is an apocalyptic number.

It is an amenable number.

9901099901 is a deficient number, since it is larger than the sum of its proper divisors (2443128643).

9901099901 is a wasteful number, since it uses less digits than its factorization.

9901099901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128585731.

The product of its (nonzero) digits is 59049, while the sum is 47.

The square root of 9901099901 is about 99504.2707676409. The cubic root of 9901099901 is about 2147.3086859230.

The spelling of 9901099901 in words is "nine billion, nine hundred one million, ninety-nine thousand, nine hundred one".