100866021 has 8 divisors (see below), whose sum is σ = 136495584. Its totient is φ = 66240240.

The previous prime is 100866019. The next prime is 100866043. The reversal of 100866021 is 120668001.

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

It is not a de Polignac number, because 100866021 - 2¹ = 100866019 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 100865982 and 100866000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100866091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250710 + ... + 251111.

It is an arithmetic number, because the mean of its divisors is an integer number (17061948).

Almost surely, 2^100866021 is an apocalyptic number.

It is an amenable number.

100866021 is a deficient number, since it is larger than the sum of its proper divisors (35629563).

100866021 is an equidigital number, since it uses as much as digits as its factorization.

100866021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501891.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 100866021 is about 10043.2077047127. The cubic root of 100866021 is about 465.4949383805.

The spelling of 100866021 in words is "one hundred million, eight hundred sixty-six thousand, twenty-one".