2021100300173 has 2 divisors, whose sum is σ = 2021100300174. Its totient is φ = 2021100300172.

The previous prime is 2021100300157. The next prime is 2021100300179. The reversal of 2021100300173 is 3710030011202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2012320984969 + 8779315204 = 1418563^2 + 93698^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021100300173 - 2⁴ = 2021100300157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021100300179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010550150086 + 1010550150087.

It is an arithmetic number, because the mean of its divisors is an integer number (1010550150087).

Almost surely, 2^{2021100300173} is an apocalyptic number.

It is an amenable number.

2021100300173 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021100300173 is an equidigital number, since it uses as much as digits as its factorization.

2021100300173 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 2021100300173 its reverse (3710030011202), we get a palindrome (5731130311375).

The spelling of 2021100300173 in words is "two trillion, twenty-one billion, one hundred million, three hundred thousand, one hundred seventy-three".