210680642037181 has 2 divisors, whose sum is σ = 210680642037182. Its totient is φ = 210680642037180.

The previous prime is 210680642037179. The next prime is 210680642037233. The reversal of 210680642037181 is 181730246086012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210164458702500 + 516183334681 = 14497050^2 + 718459^2 .

It is a cyclic number.

It is not a de Polignac number, because 210680642037181 - 2¹ = 210680642037179 is a prime.

It is a super-2 number, since 2×210680642037181² (a number of 29 digits) contains 22 as substring.

Together with 210680642037179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210680642037581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105340321018590 + 105340321018591.

It is an arithmetic number, because the mean of its divisors is an integer number (105340321018591).

Almost surely, 2^{210680642037181} is an apocalyptic number.

It is an amenable number.

210680642037181 is a deficient number, since it is larger than the sum of its proper divisors (1).

210680642037181 is an equidigital number, since it uses as much as digits as its factorization.

210680642037181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 774144, while the sum is 49.

The spelling of 210680642037181 in words is "two hundred ten trillion, six hundred eighty billion, six hundred forty-two million, thirty-seven thousand, one hundred eighty-one".