100002100321 has 4 divisors (see below), whose sum is σ = 100639056532. Its totient is φ = 99365144112.

The previous prime is 100002100301. The next prime is 100002100333. The reversal of 100002100321 is 123001200001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57473349696 + 42528750625 = 239736^2 + 206225^2 .

It is a cyclic number.

It is not a de Polignac number, because 100002100321 - 2³³ = 91412165729 is a prime.

It is a super-2 number, since 2×100002100321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100002100298 and 100002100307.

It is not an unprimeable number, because it can be changed into a prime (100002100301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318477870 + ... + 318478183.

It is an arithmetic number, because the mean of its divisors is an integer number (25159764133).

Almost surely, 2^100002100321 is an apocalyptic number.

It is an amenable number.

100002100321 is a deficient number, since it is larger than the sum of its proper divisors (636956211).

100002100321 is an equidigital number, since it uses as much as digits as its factorization.

100002100321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636956210.

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

Adding to 100002100321 its reverse (123001200001), we get a palindrome (223003300322).

The spelling of 100002100321 in words is "one hundred billion, two million, one hundred thousand, three hundred twenty-one".