212121221200201 has 16 divisors (see below), whose sum is σ = 214798441987584. Its totient is φ = 209464246353024.

The previous prime is 212121221200181. The next prime is 212121221200249. The reversal of 212121221200201 is 102002122121212.

It is a cyclic number.

It is not a de Polignac number, because 212121221200201 - 2⁴¹ = 209922197944649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212121221200001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13588200 + ... + 24675526.

It is an arithmetic number, because the mean of its divisors is an integer number (13424902624224).

Almost surely, 2^{212121221200201} is an apocalyptic number.

It is an amenable number.

212121221200201 is a deficient number, since it is larger than the sum of its proper divisors (2677220787383).

212121221200201 is a wasteful number, since it uses less digits than its factorization.

212121221200201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11088240.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 212121221200201 its reverse (102002122121212), we get a palindrome (314123343321413).

The spelling of 212121221200201 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred thousand, two hundred one".