211203209551 has 2 divisors, whose sum is σ = 211203209552. Its totient is φ = 211203209550.

The previous prime is 211203209509. The next prime is 211203209563. The reversal of 211203209551 is 155902302112.

211203209551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211203209551 - 2¹⁹ = 211202685263 is a prime.

It is a super-3 number, since 3×211203209551³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211203209051) 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, 105601604775 + 105601604776.

It is an arithmetic number, because the mean of its divisors is an integer number (105601604776).

Almost surely, 2^211203209551 is an apocalyptic number.

211203209551 is a deficient number, since it is larger than the sum of its proper divisors (1).

211203209551 is an equidigital number, since it uses as much as digits as its factorization.

211203209551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 211203209551 in words is "two hundred eleven billion, two hundred three million, two hundred nine thousand, five hundred fifty-one".