11221120221121 has 2 divisors, whose sum is σ = 11221120221122. Its totient is φ = 11221120221120.

The previous prime is 11221120221119. The next prime is 11221120221133. The reversal of 11221120221121 is 12112202112211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10719495076096 + 501625145025 = 3274064^2 + 708255^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221120221121 - 2¹ = 11221120221119 is a prime.

Together with 11221120221119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11221120221191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610560110560 + 5610560110561.

It is an arithmetic number, because the mean of its divisors is an integer number (5610560110561).

Almost surely, 2^{11221120221121} is an apocalyptic number.

It is an amenable number.

11221120221121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221120221121 is an equidigital number, since it uses as much as digits as its factorization.

11221120221121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11221120221121 its reverse (12112202112211), we get a palindrome (23333322333332).

The spelling of 11221120221121 in words is "eleven trillion, two hundred twenty-one billion, one hundred twenty million, two hundred twenty-one thousand, one hundred twenty-one".