211835121055543 has 2 divisors, whose sum is σ = 211835121055544. Its totient is φ = 211835121055542.

The previous prime is 211835121055541. The next prime is 211835121055651. The reversal of 211835121055543 is 345550121538112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211835121055543 - 2¹ = 211835121055541 is a prime.

Together with 211835121055541, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 211835121055493 and 211835121055502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211835121055541) 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, 105917560527771 + 105917560527772.

It is an arithmetic number, because the mean of its divisors is an integer number (105917560527772).

Almost surely, 2^{211835121055543} is an apocalyptic number.

211835121055543 is a deficient number, since it is larger than the sum of its proper divisors (1).

211835121055543 is an equidigital number, since it uses as much as digits as its factorization.

211835121055543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720000, while the sum is 46.

The spelling of 211835121055543 in words is "two hundred eleven trillion, eight hundred thirty-five billion, one hundred twenty-one million, fifty-five thousand, five hundred forty-three".