211200002081 has 2 divisors, whose sum is σ = 211200002082. Its totient is φ = 211200002080.

The previous prime is 211200001997. The next prime is 211200002089. The reversal of 211200002081 is 180200002112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110197441600 + 101002560481 = 331960^2 + 317809^2 .

It is a cyclic number.

It is not a de Polignac number, because 211200002081 - 2²⁶ = 211132893217 is a prime.

It is a super-2 number, since 2×211200002081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211200002089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105600001040 + 105600001041.

It is an arithmetic number, because the mean of its divisors is an integer number (105600001041).

Almost surely, 2^211200002081 is an apocalyptic number.

It is an amenable number.

211200002081 is a deficient number, since it is larger than the sum of its proper divisors (1).

211200002081 is an equidigital number, since it uses as much as digits as its factorization.

211200002081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211200002081 its reverse (180200002112), we get a palindrome (391400004193).

The spelling of 211200002081 in words is "two hundred eleven billion, two hundred million, two thousand, eighty-one".