211242555121 has 8 divisors (see below), whose sum is σ = 228337681320. Its totient is φ = 194268243072.

The previous prime is 211242555053. The next prime is 211242555257. The reversal of 211242555121 is 121555242112.

211242555121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 20938090000 + 190304465121 = 144700^2 + 436239^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211242555121 - 2¹¹ = 211242553073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211240555121) 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 in 7 ways as a sum of consecutive naturals, for example, 30199900 + ... + 30206893.

It is an arithmetic number, because the mean of its divisors is an integer number (28542210165).

Almost surely, 2^211242555121 is an apocalyptic number.

It is an amenable number.

211242555121 is a deficient number, since it is larger than the sum of its proper divisors (17095126199).

211242555121 is a wasteful number, since it uses less digits than its factorization.

211242555121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60407075.

The product of its digits is 8000, while the sum is 31.

Adding to 211242555121 its reverse (121555242112), we get a palindrome (332797797233).

The spelling of 211242555121 in words is "two hundred eleven billion, two hundred forty-two million, five hundred fifty-five thousand, one hundred twenty-one".