211499608321 has 2 divisors, whose sum is σ = 211499608322. Its totient is φ = 211499608320.

The previous prime is 211499608253. The next prime is 211499608393. The reversal of 211499608321 is 123806994112.

211499608321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147333145600 + 64166462721 = 383840^2 + 253311^2 .

It is a cyclic number.

It is not a de Polignac number, because 211499608321 - 2¹¹ = 211499606273 is a prime.

It is not a weakly prime, because it can be changed into another prime (211499608721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105749804160 + 105749804161.

It is an arithmetic number, because the mean of its divisors is an integer number (105749804161).

Almost surely, 2^211499608321 is an apocalyptic number.

It is an amenable number.

211499608321 is a deficient number, since it is larger than the sum of its proper divisors (1).

211499608321 is an equidigital number, since it uses as much as digits as its factorization.

211499608321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 211499608321 in words is "two hundred eleven billion, four hundred ninety-nine million, six hundred eight thousand, three hundred twenty-one".