100681021 has 8 divisors (see below), whose sum is σ = 121832640. Its totient is φ = 81221568.

The previous prime is 100681001. The next prime is 100681027. The reversal of 100681021 is 120186001.

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 100681021 - 2⁵ = 100680989 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 100681021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100681027) 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, 422911 + ... + 423148.

It is an arithmetic number, because the mean of its divisors is an integer number (15229080).

Almost surely, 2^100681021 is an apocalyptic number.

It is an amenable number.

100681021 is a deficient number, since it is larger than the sum of its proper divisors (21151619).

100681021 is an equidigital number, since it uses as much as digits as its factorization.

100681021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846083.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 100681021 is about 10033.9932728700. The cubic root of 100681021 is about 465.2101736146.

The spelling of 100681021 in words is "one hundred million, six hundred eighty-one thousand, twenty-one".