11221202100221 has 2 divisors, whose sum is σ = 11221202100222. Its totient is φ = 11221202100220.

The previous prime is 11221202100197. The next prime is 11221202100289. The reversal of 11221202100221 is 12200120212211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8896415774596 + 2324786325625 = 2982686^2 + 1524725^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221202100221 - 2¹⁴ = 11221202083837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11221202100221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11221202160221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610601050110 + 5610601050111.

It is an arithmetic number, because the mean of its divisors is an integer number (5610601050111).

Almost surely, 2^{11221202100221} is an apocalyptic number.

It is an amenable number.

11221202100221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221202100221 is an equidigital number, since it uses as much as digits as its factorization.

11221202100221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11221202100221 its reverse (12200120212211), we get a palindrome (23421322312432).

The spelling of 11221202100221 in words is "eleven trillion, two hundred twenty-one billion, two hundred two million, one hundred thousand, two hundred twenty-one".