999901101100100 has 18 divisors (see below), whose sum is σ = 2169785389387434. Its totient is φ = 399960440440000.

The previous prime is 999901101100091. The next prime is 999901101100211. The reversal of 999901101100100 is 1001101109999.

It is a happy number.

999901101100100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 261341883909184 + 738559217190916 = 16166072^2 + 27176446^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4999505505401 + ... + 4999505505600.

Almost surely, 2^{999901101100100} is an apocalyptic number.

It is an amenable number.

999901101100100 is an abundant number, since it is smaller than the sum of its proper divisors (1169884288287334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999901101100100 is a wasteful number, since it uses less digits than its factorization.

999901101100100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9999011011015 (or 9999011011008 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 41.

The spelling of 999901101100100 in words is "nine hundred ninety-nine trillion, nine hundred one billion, one hundred one million, one hundred thousand, one hundred".