11221323202121 has 2 divisors, whose sum is σ = 11221323202122. Its totient is φ = 11221323202120.

The previous prime is 11221323202051. The next prime is 11221323202129. The reversal of 11221323202121 is 12120232312211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10131520830025 + 1089802372096 = 3183005^2 + 1043936^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221323202121 - 2¹⁸ = 11221322939977 is a prime.

It is not a weakly prime, because it can be changed into another prime (11221323202129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610661601060 + 5610661601061.

It is an arithmetic number, because the mean of its divisors is an integer number (5610661601061).

Almost surely, 2^{11221323202121} is an apocalyptic number.

It is an amenable number.

11221323202121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221323202121 is an equidigital number, since it uses as much as digits as its factorization.

11221323202121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 11221323202121 its reverse (12120232312211), we get a palindrome (23341555514332).

The spelling of 11221323202121 in words is "eleven trillion, two hundred twenty-one billion, three hundred twenty-three million, two hundred two thousand, one hundred twenty-one".