20201100012173 has 2 divisors, whose sum is σ = 20201100012174. Its totient is φ = 20201100012172.

The previous prime is 20201100012161. The next prime is 20201100012319. The reversal of 20201100012173 is 37121000110202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10909564579369 + 9291535432804 = 3302963^2 + 3048202^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201100012173 - 2¹² = 20201100008077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20201100017173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100550006086 + 10100550006087.

It is an arithmetic number, because the mean of its divisors is an integer number (10100550006087).

Almost surely, 2^{20201100012173} is an apocalyptic number.

It is an amenable number.

20201100012173 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201100012173 is an equidigital number, since it uses as much as digits as its factorization.

20201100012173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 20.

Adding to 20201100012173 its reverse (37121000110202), we get a palindrome (57322100122375).

The spelling of 20201100012173 in words is "twenty trillion, two hundred one billion, one hundred million, twelve thousand, one hundred seventy-three".