201221120201 has 2 divisors, whose sum is σ = 201221120202. Its totient is φ = 201221120200.

The previous prime is 201221120153. The next prime is 201221120239. The reversal of 201221120201 is 102021122102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199773241600 + 1447878601 = 446960^2 + 38051^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201221120201 is a prime.

It is not a weakly prime, because it can be changed into another prime (201221120281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610560100 + 100610560101.

It is an arithmetic number, because the mean of its divisors is an integer number (100610560101).

Almost surely, 2^201221120201 is an apocalyptic number.

It is an amenable number.

201221120201 is a deficient number, since it is larger than the sum of its proper divisors (1).

201221120201 is an equidigital number, since it uses as much as digits as its factorization.

201221120201 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 14.

Adding to 201221120201 its reverse (102021122102), we get a palindrome (303242242303).

The spelling of 201221120201 in words is "two hundred one billion, two hundred twenty-one million, one hundred twenty thousand, two hundred one".