212112201200021 has 16 divisors (see below), whose sum is σ = 223809682483200. Its totient is φ = 200468190654000.

The previous prime is 212112201199981. The next prime is 212112201200033. The reversal of 212112201200021 is 120002102211212.

It is a cyclic number.

It is not a de Polignac number, because 212112201200021 - 2¹⁴ = 212112201183637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212112201200071) 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 in 15 ways as a sum of consecutive naturals, for example, 73239776 + ... + 76080806.

It is an arithmetic number, because the mean of its divisors is an integer number (13988105155200).

Almost surely, 2^{212112201200021} is an apocalyptic number.

It is an amenable number.

212112201200021 is a deficient number, since it is larger than the sum of its proper divisors (11697481283179).

212112201200021 is a wasteful number, since it uses less digits than its factorization.

212112201200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2850440.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212112201200021 its reverse (120002102211212), we get a palindrome (332114303411233).

The spelling of 212112201200021 in words is "two hundred twelve trillion, one hundred twelve billion, two hundred one million, two hundred thousand, twenty-one".