100001321 has 8 divisors (see below), whose sum is σ = 114355584. Its totient is φ = 85664160.

The previous prime is 100001303. The next prime is 100001329. The reversal of 100001321 is 123100001.

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 100001321 - 2¹⁸ = 99739177 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 100001299 and 100001308.

It is not an unprimeable number, because it can be changed into a prime (100001329) 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, 12836 + ... + 19098.

It is an arithmetic number, because the mean of its divisors is an integer number (14294448).

Almost surely, 2^100001321 is an apocalyptic number.

It is an amenable number.

100001321 is a deficient number, since it is larger than the sum of its proper divisors (14354263).

100001321 is an equidigital number, since it uses as much as digits as its factorization.

100001321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8551.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 100001321 is about 10000.0660497819. The cubic root of 100001321 is about 464.1609271986.

Adding to 100001321 its reverse (123100001), we get a palindrome (223101322).

The spelling of 100001321 in words is "one hundred million, one thousand, three hundred twenty-one".