100821046512784 has 20 divisors (see below), whose sum is σ = 210366991281916. Its totient is φ = 46532790698112.

The previous prime is 100821046512779. The next prime is 100821046512787. The reversal of 100821046512784 is 487215640128001.

It can be written as a sum of positive squares in 2 ways, for example, as 6073405367184 + 94747641145600 = 2464428^2 + 9733840^2 .

It is not an unprimeable number, because it can be changed into a prime (100821046512787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242358284679 + ... + 242358285094.

Almost surely, 2^{100821046512784} is an apocalyptic number.

It is an amenable number.

100821046512784 is an abundant number, since it is smaller than the sum of its proper divisors (109545944769132).

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

100821046512784 is a wasteful number, since it uses less digits than its factorization.

100821046512784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484716569794 (or 484716569788 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 49.

The spelling of 100821046512784 in words is "one hundred trillion, eight hundred twenty-one billion, forty-six million, five hundred twelve thousand, seven hundred eighty-four".