210020132320181 has 2 divisors, whose sum is σ = 210020132320182. Its totient is φ = 210020132320180.

The previous prime is 210020132320157. The next prime is 210020132320237. The reversal of 210020132320181 is 181023231020012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125726323200625 + 84293809119556 = 11212775^2 + 9181166^2 .

It is a cyclic number.

It is not a de Polignac number, because 210020132320181 - 2¹⁰ = 210020132319157 is a prime.

It is a super-2 number, since 2×210020132320181² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 210020132320181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210020132322181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010066160090 + 105010066160091.

It is an arithmetic number, because the mean of its divisors is an integer number (105010066160091).

Almost surely, 2^{210020132320181} is an apocalyptic number.

It is an amenable number.

210020132320181 is a deficient number, since it is larger than the sum of its proper divisors (1).

210020132320181 is an equidigital number, since it uses as much as digits as its factorization.

210020132320181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 210020132320181 its reverse (181023231020012), we get a palindrome (391043363340193).

The spelling of 210020132320181 in words is "two hundred ten trillion, twenty billion, one hundred thirty-two million, three hundred twenty thousand, one hundred eighty-one".