212010221221201 has 4 divisors (see below), whose sum is σ = 228318699776692. Its totient is φ = 195701742665712.

The previous prime is 212010221221157. The next prime is 212010221221219. The reversal of 212010221221201 is 102122122010212.

212010221221201 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 20059864422976 + 191950356798225 = 4478824^2 + 13854615^2 .

It is a cyclic number.

It is not a de Polignac number, because 212010221221201 - 2³⁹ = 211460465407313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212110221221201) 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, 8154239277726 + ... + 8154239277751.

It is an arithmetic number, because the mean of its divisors is an integer number (57079674944173).

Almost surely, 2^{212010221221201} is an apocalyptic number.

It is an amenable number.

212010221221201 is a deficient number, since it is larger than the sum of its proper divisors (16308478555491).

212010221221201 is a wasteful number, since it uses less digits than its factorization.

212010221221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16308478555490.

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

Adding to 212010221221201 its reverse (102122122010212), we get a palindrome (314132343231413).

The spelling of 212010221221201 in words is "two hundred twelve trillion, ten billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred one".