21010001099982 has 128 divisors (see below), whose sum is σ = 47747267043840. Its totient is φ = 6122763878400.

The previous prime is 21010001099957. The next prime is 21010001100017. The reversal of 21010001099982 is 28999010001012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 164381233 + ... + 164508995.

It is an arithmetic number, because the mean of its divisors is an integer number (373025523780).

Almost surely, 2^{21010001099982} is an apocalyptic number.

21010001099982 is an abundant number, since it is smaller than the sum of its proper divisors (26737265943858).

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

21010001099982 is a wasteful number, since it uses less digits than its factorization.

21010001099982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129458.

The product of its (nonzero) digits is 23328, while the sum is 42.

The spelling of 21010001099982 in words is "twenty-one trillion, ten billion, one million, ninety-nine thousand, nine hundred eighty-two".