11220011201221 has 2 divisors, whose sum is σ = 11220011201222. Its totient is φ = 11220011201220.

The previous prime is 11220011201173. The next prime is 11220011201233. The reversal of 11220011201221 is 12210211002211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9917870040225 + 1302141160996 = 3149265^2 + 1141114^2 .

It is an emirp because it is prime and its reverse (12210211002211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11220011201221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11220011201195 and 11220011201204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11220011201261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610005600610 + 5610005600611.

It is an arithmetic number, because the mean of its divisors is an integer number (5610005600611).

Almost surely, 2^{11220011201221} is an apocalyptic number.

It is an amenable number.

11220011201221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220011201221 is an equidigital number, since it uses as much as digits as its factorization.

11220011201221 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 16.

Adding to 11220011201221 its reverse (12210211002211), we get a palindrome (23430222203432).

The spelling of 11220011201221 in words is "eleven trillion, two hundred twenty billion, eleven million, two hundred one thousand, two hundred twenty-one".