11133120221 has 2 divisors, whose sum is σ = 11133120222. Its totient is φ = 11133120220.

The previous prime is 11133120209. The next prime is 11133120247. The reversal of 11133120221 is 12202133111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10870356121 + 262764100 = 104261^2 + 16210^2 .

It is a cyclic number.

It is not a de Polignac number, because 11133120221 - 2²⁶ = 11066011357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11133120221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11133120821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5566560110 + 5566560111.

It is an arithmetic number, because the mean of its divisors is an integer number (5566560111).

Almost surely, 2^11133120221 is an apocalyptic number.

It is an amenable number.

11133120221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11133120221 is an equidigital number, since it uses as much as digits as its factorization.

11133120221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11133120221 its reverse (12202133111), we get a palindrome (23335253332).

The spelling of 11133120221 in words is "eleven billion, one hundred thirty-three million, one hundred twenty thousand, two hundred twenty-one".