212201202120221 has 2 divisors, whose sum is σ = 212201202120222. Its totient is φ = 212201202120220.

The previous prime is 212201202120161. The next prime is 212201202120239. The reversal of 212201202120221 is 122021202102212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138719635084900 + 73481567035321 = 11777930^2 + 8572139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212201202120221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212201202120193 and 212201202120202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212201202120521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106100601060110 + 106100601060111.

It is an arithmetic number, because the mean of its divisors is an integer number (106100601060111).

Almost surely, 2^{212201202120221} is an apocalyptic number.

It is an amenable number.

212201202120221 is a deficient number, since it is larger than the sum of its proper divisors (1).

212201202120221 is an equidigital number, since it uses as much as digits as its factorization.

212201202120221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 212201202120221 its reverse (122021202102212), we get a palindrome (334222404222433).

The spelling of 212201202120221 in words is "two hundred twelve trillion, two hundred one billion, two hundred two million, one hundred twenty thousand, two hundred twenty-one".