212101211212201 has 4 divisors (see below), whose sum is σ = 212101256000452. Its totient is φ = 212101166423952.

The previous prime is 212101211212199. The next prime is 212101211212207. The reversal of 212101211212201 is 102212112101212.

It is a happy number.

212101211212201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12979620220176 + 199121590992025 = 3602724^2 + 14111045^2 .

It is a cyclic number.

It is not a de Polignac number, because 212101211212201 - 2¹ = 212101211212199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212101211212207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14320386 + ... + 25085371.

It is an arithmetic number, because the mean of its divisors is an integer number (53025314000113).

Almost surely, 2^{212101211212201} is an apocalyptic number.

It is an amenable number.

212101211212201 is a deficient number, since it is larger than the sum of its proper divisors (44788251).

212101211212201 is an equidigital number, since it uses as much as digits as its factorization.

212101211212201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44788250.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 212101211212201 its reverse (102212112101212), we get a palindrome (314313323313413).

The spelling of 212101211212201 in words is "two hundred twelve trillion, one hundred one billion, two hundred eleven million, two hundred twelve thousand, two hundred one".