9900100100021 has 8 divisors (see below), whose sum is σ = 10726237044864. Its totient is φ = 9101049612480.

The previous prime is 9900100099913. The next prime is 9900100100041. The reversal of 9900100100021 is 1200010010099.

9900100100021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 9900100100021 - 2²⁶ = 9900032991157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9900100100021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9900100100041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6771613565 + ... + 6771615026.

It is an arithmetic number, because the mean of its divisors is an integer number (1340779630608).

Almost surely, 2^{9900100100021} is an apocalyptic number.

It is an amenable number.

9900100100021 is a deficient number, since it is larger than the sum of its proper divisors (826136944843).

9900100100021 is a wasteful number, since it uses less digits than its factorization.

9900100100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13543228651.

The product of its (nonzero) digits is 162, while the sum is 23.

The spelling of 9900100100021 in words is "nine trillion, nine hundred billion, one hundred million, one hundred thousand, twenty-one".