201221223241 has 2 divisors, whose sum is σ = 201221223242. Its totient is φ = 201221223240.

The previous prime is 201221223223. The next prime is 201221223337. The reversal of 201221223241 is 142322122102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151846605625 + 49374617616 = 389675^2 + 222204^2 .

It is a cyclic number.

It is not a de Polignac number, because 201221223241 - 2²¹ = 201219126089 is a prime.

It is not a weakly prime, because it can be changed into another prime (201221229241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610611620 + 100610611621.

It is an arithmetic number, because the mean of its divisors is an integer number (100610611621).

Almost surely, 2^201221223241 is an apocalyptic number.

It is an amenable number.

201221223241 is a deficient number, since it is larger than the sum of its proper divisors (1).

201221223241 is an equidigital number, since it uses as much as digits as its factorization.

201221223241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 201221223241 its reverse (142322122102), we get a palindrome (343543345343).

The spelling of 201221223241 in words is "two hundred one billion, two hundred twenty-one million, two hundred twenty-three thousand, two hundred forty-one".