201221210033 has 2 divisors, whose sum is σ = 201221210034. Its totient is φ = 201221210032.

The previous prime is 201221210017. The next prime is 201221210117. The reversal of 201221210033 is 330012122102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200123811904 + 1097398129 = 447352^2 + 33127^2 .

It is a cyclic number.

It is not a de Polignac number, because 201221210033 - 2⁴ = 201221210017 is a prime.

It is a super-2 number, since 2×201221210033² (a number of 23 digits) contains 22 as substring.

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 = 201221209993 and 201221210020.

It is not a weakly prime, because it can be changed into another prime (201221216033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610605016 + 100610605017.

It is an arithmetic number, because the mean of its divisors is an integer number (100610605017).

Almost surely, 2^201221210033 is an apocalyptic number.

It is an amenable number.

201221210033 is a deficient number, since it is larger than the sum of its proper divisors (1).

201221210033 is an equidigital number, since it uses as much as digits as its factorization.

201221210033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 201221210033 its reverse (330012122102), we get a palindrome (531233332135).

The spelling of 201221210033 in words is "two hundred one billion, two hundred twenty-one million, two hundred ten thousand, thirty-three".