20310211310161 has 2 divisors, whose sum is σ = 20310211310162. Its totient is φ = 20310211310160.

The previous prime is 20310211310143. The next prime is 20310211310197. The reversal of 20310211310161 is 16101311201302.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20135466409536 + 174744900625 = 4487256^2 + 418025^2 .

It is a cyclic number.

It is not a de Polignac number, because 20310211310161 - 2²³ = 20310202921553 is a prime.

It is not a weakly prime, because it can be changed into another prime (20310211310101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155105655080 + 10155105655081.

It is an arithmetic number, because the mean of its divisors is an integer number (10155105655081).

Almost surely, 2^{20310211310161} is an apocalyptic number.

It is an amenable number.

20310211310161 is a deficient number, since it is larger than the sum of its proper divisors (1).

20310211310161 is an equidigital number, since it uses as much as digits as its factorization.

20310211310161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 20310211310161 its reverse (16101311201302), we get a palindrome (36411522511463).

The spelling of 20310211310161 in words is "twenty trillion, three hundred ten billion, two hundred eleven million, three hundred ten thousand, one hundred sixty-one".