100321021 has 8 divisors (see below), whose sum is σ = 103894560. Its totient is φ = 96803952.

The previous prime is 100321003. The next prime is 100321037. The reversal of 100321021 is 120123001.

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 100321021 - 2⁹ = 100320509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100320989 and 100321007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100321051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10486 + ... + 17623.

It is an arithmetic number, because the mean of its divisors is an integer number (12986820).

Almost surely, 2^100321021 is an apocalyptic number.

It is an amenable number.

100321021 is a deficient number, since it is larger than the sum of its proper divisors (3573539).

100321021 is an equidigital number, since it uses as much as digits as its factorization.

100321021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28235.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 100321021 is about 10016.0381888250. The cubic root of 100321021 is about 464.6550353184.

Adding to 100321021 its reverse (120123001), we get a palindrome (220444022).

The spelling of 100321021 in words is "one hundred million, three hundred twenty-one thousand, twenty-one".