201111320210221 has 2 divisors, whose sum is σ = 201111320210222. Its totient is φ = 201111320210220.

The previous prime is 201111320210197. The next prime is 201111320210237. The reversal of 201111320210221 is 122012023111102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187198793207721 + 13912527002500 = 13682061^2 + 3729950^2 .

It is a cyclic number.

It is not a de Polignac number, because 201111320210221 - 2¹¹ = 201111320208173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201111320216221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100555660105110 + 100555660105111.

It is an arithmetic number, because the mean of its divisors is an integer number (100555660105111).

Almost surely, 2^{201111320210221} is an apocalyptic number.

It is an amenable number.

201111320210221 is a deficient number, since it is larger than the sum of its proper divisors (1).

201111320210221 is an equidigital number, since it uses as much as digits as its factorization.

201111320210221 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 19.

Adding to 201111320210221 its reverse (122012023111102), we get a palindrome (323123343321323).

The spelling of 201111320210221 in words is "two hundred one trillion, one hundred eleven billion, three hundred twenty million, two hundred ten thousand, two hundred twenty-one".