11201210112221 has 2 divisors, whose sum is σ = 11201210112222. Its totient is φ = 11201210112220.

The previous prime is 11201210112217. The next prime is 11201210112247. The reversal of 11201210112221 is 12221101210211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9384143856025 + 1817066256196 = 3063355^2 + 1347986^2 .

It is a cyclic number.

It is not a de Polignac number, because 11201210112221 - 2² = 11201210112217 is a prime.

It is a super-3 number, since 3×11201210112221³ (a number of 40 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11201210112221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11201210112271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5600605056110 + 5600605056111.

It is an arithmetic number, because the mean of its divisors is an integer number (5600605056111).

Almost surely, 2^{11201210112221} is an apocalyptic number.

It is an amenable number.

11201210112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11201210112221 is an equidigital number, since it uses as much as digits as its factorization.

11201210112221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11201210112221 its reverse (12221101210211), we get a palindrome (23422311322432).

The spelling of 11201210112221 in words is "eleven trillion, two hundred one billion, two hundred ten million, one hundred twelve thousand, two hundred twenty-one".