212010101210221 has 2 divisors, whose sum is σ = 212010101210222. Its totient is φ = 212010101210220.

The previous prime is 212010101210213. The next prime is 212010101210287. The reversal of 212010101210221 is 122012101010212.

212010101210221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201989869234596 + 10020231975625 = 14212314^2 + 3165475^2 .

It is a cyclic number.

It is not a de Polignac number, because 212010101210221 - 2³ = 212010101210213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212010101210195 and 212010101210204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212010101210521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106005050605110 + 106005050605111.

It is an arithmetic number, because the mean of its divisors is an integer number (106005050605111).

Almost surely, 2^{212010101210221} is an apocalyptic number.

It is an amenable number.

212010101210221 is a deficient number, since it is larger than the sum of its proper divisors (1).

212010101210221 is an equidigital number, since it uses as much as digits as its factorization.

212010101210221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212010101210221 its reverse (122012101010212), we get a palindrome (334022202220433).

The spelling of 212010101210221 in words is "two hundred twelve trillion, ten billion, one hundred one million, two hundred ten thousand, two hundred twenty-one".