11220202221121 has 4 divisors (see below), whose sum is σ = 11220243675732. Its totient is φ = 11220160766512.

The previous prime is 11220202221101. The next prime is 11220202221149. The reversal of 11220202221121 is 12112220202211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9324692820496 + 1895509400625 = 3053636^2 + 1376775^2 .

It is a cyclic number.

It is not a de Polignac number, because 11220202221121 - 2¹¹ = 11220202219073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11220202221101) 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 in 3 ways as a sum of consecutive naturals, for example, 20318626 + ... + 20863531.

It is an arithmetic number, because the mean of its divisors is an integer number (2805060918933).

Almost surely, 2^{11220202221121} is an apocalyptic number.

It is an amenable number.

11220202221121 is a deficient number, since it is larger than the sum of its proper divisors (41454611).

11220202221121 is an equidigital number, since it uses as much as digits as its factorization.

11220202221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41454610.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 11220202221121 its reverse (12112220202211), we get a palindrome (23332422423332).

The spelling of 11220202221121 in words is "eleven trillion, two hundred twenty billion, two hundred two million, two hundred twenty-one thousand, one hundred twenty-one".