211202210081 has 2 divisors, whose sum is σ = 211202210082. Its totient is φ = 211202210080.

The previous prime is 211202210071. The next prime is 211202210111. The reversal of 211202210081 is 180012202112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201978336400 + 9223873681 = 449420^2 + 96041^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211202210081 is a prime.

It is a super-2 number, since 2×211202210081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211202210071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105601105040 + 105601105041.

It is an arithmetic number, because the mean of its divisors is an integer number (105601105041).

Almost surely, 2^211202210081 is an apocalyptic number.

It is an amenable number.

211202210081 is a deficient number, since it is larger than the sum of its proper divisors (1).

211202210081 is an equidigital number, since it uses as much as digits as its factorization.

211202210081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 211202210081 its reverse (180012202112), we get a palindrome (391214412193).

The spelling of 211202210081 in words is "two hundred eleven billion, two hundred two million, two hundred ten thousand, eighty-one".