121211121020211 has 24 divisors (see below), whose sum is σ = 181128813596640. Its totient is φ = 78055942032000.

The previous prime is 121211121020153. The next prime is 121211121020221. The reversal of 121211121020211 is 112020121112121.

It is a happy number.

121211121020211 is a `hidden beast` number, since 1 + 212 + 1 + 11 + 210 + 20 + 211 = 666.

It is not a de Polignac number, because 121211121020211 - 2¹⁴ = 121211121003827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121211121020221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1626128191 + ... + 1626202728.

It is an arithmetic number, because the mean of its divisors is an integer number (7547033899860).

Almost surely, 2^{121211121020211} is an apocalyptic number.

121211121020211 is a deficient number, since it is larger than the sum of its proper divisors (59917692576429).

121211121020211 is a wasteful number, since it uses less digits than its factorization.

121211121020211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3252331067 (or 3252331064 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 121211121020211 its reverse (112020121112121), we get a palindrome (233231242132332).

The spelling of 121211121020211 in words is "one hundred twenty-one trillion, two hundred eleven billion, one hundred twenty-one million, twenty thousand, two hundred eleven".