201110232221 has 2 divisors, whose sum is σ = 201110232222. Its totient is φ = 201110232220.

The previous prime is 201110232187. The next prime is 201110232227. The reversal of 201110232221 is 122232011102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166577443321 + 34532788900 = 408139^2 + 185830^2 .

It is a cyclic number.

It is not a de Polignac number, because 201110232221 - 2⁶ = 201110232157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201110232221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201110232227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100555116110 + 100555116111.

It is an arithmetic number, because the mean of its divisors is an integer number (100555116111).

Almost surely, 2^201110232221 is an apocalyptic number.

It is an amenable number.

201110232221 is a deficient number, since it is larger than the sum of its proper divisors (1).

201110232221 is an equidigital number, since it uses as much as digits as its factorization.

201110232221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 201110232221 its reverse (122232011102), we get a palindrome (323342243323).

The spelling of 201110232221 in words is "two hundred one billion, one hundred ten million, two hundred thirty-two thousand, two hundred twenty-one".