211200001081 has 2 divisors, whose sum is σ = 211200001082. Its totient is φ = 211200001080.

The previous prime is 211200001003. The next prime is 211200001087. The reversal of 211200001081 is 180100002112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188255325456 + 22944675625 = 433884^2 + 151475^2 .

It is a cyclic number.

It is not a de Polignac number, because 211200001081 - 2⁹ = 211200000569 is a prime.

It is a super-2 number, since 2×211200001081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211200001087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105600000540 + 105600000541.

It is an arithmetic number, because the mean of its divisors is an integer number (105600000541).

Almost surely, 2^211200001081 is an apocalyptic number.

It is an amenable number.

211200001081 is a deficient number, since it is larger than the sum of its proper divisors (1).

211200001081 is an equidigital number, since it uses as much as digits as its factorization.

211200001081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211200001081 its reverse (180100002112), we get a palindrome (391300003193).

The spelling of 211200001081 in words is "two hundred eleven billion, two hundred million, one thousand, eighty-one".