212211211200021 has 12 divisors (see below), whose sum is σ = 334393423709280. Its totient is φ = 128612855272680.

The previous prime is 212211211200019. The next prime is 212211211200113. The reversal of 212211211200021 is 120002112112212.

212211211200021 is a `hidden beast` number, since 21 + 2 + 211 + 211 + 200 + 0 + 21 = 666.

It is not a de Polignac number, because 212211211200021 - 2¹ = 212211211200019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212211211199967 and 212211211200003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212211211200011) 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 11 ways as a sum of consecutive naturals, for example, 1071773793841 + ... + 1071773794038.

It is an arithmetic number, because the mean of its divisors is an integer number (27866118642440).

Almost surely, 2^{212211211200021} is an apocalyptic number.

It is an amenable number.

212211211200021 is a deficient number, since it is larger than the sum of its proper divisors (122182212509259).

212211211200021 is a wasteful number, since it uses less digits than its factorization.

212211211200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143547587896 (or 2143547587893 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 212211211200021 its reverse (120002112112212), we get a palindrome (332213323312233).

The spelling of 212211211200021 in words is "two hundred twelve trillion, two hundred eleven billion, two hundred eleven million, two hundred thousand, twenty-one".