100021320317 has 2 divisors, whose sum is σ = 100021320318. Its totient is φ = 100021320316.

The previous prime is 100021320307. The next prime is 100021320391. The reversal of 100021320317 is 713023120001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93914054116 + 6107266201 = 306454^2 + 78149^2 .

It is an emirp because it is prime and its reverse (713023120001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100021320317 - 2²⁴ = 100004543101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100021320307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50010660158 + 50010660159.

It is an arithmetic number, because the mean of its divisors is an integer number (50010660159).

Almost surely, 2^100021320317 is an apocalyptic number.

It is an amenable number.

100021320317 is a deficient number, since it is larger than the sum of its proper divisors (1).

100021320317 is an equidigital number, since it uses as much as digits as its factorization.

100021320317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 20.

Adding to 100021320317 its reverse (713023120001), we get a palindrome (813044440318).

The spelling of 100021320317 in words is "one hundred billion, twenty-one million, three hundred twenty thousand, three hundred seventeen".