11131330121 has 2 divisors, whose sum is σ = 11131330122. Its totient is φ = 11131330120.

The previous prime is 11131330103. The next prime is 11131330151. The reversal of 11131330121 is 12103313111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8664817225 + 2466512896 = 93085^2 + 49664^2 .

It is an emirp because it is prime and its reverse (12103313111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11131330121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11131330121.

It is not a weakly prime, because it can be changed into another prime (11131330151) 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 as a sum of consecutive naturals, namely, 5565665060 + 5565665061.

It is an arithmetic number, because the mean of its divisors is an integer number (5565665061).

Almost surely, 2^11131330121 is an apocalyptic number.

It is an amenable number.

11131330121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11131330121 is an equidigital number, since it uses as much as digits as its factorization.

11131330121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 11131330121 its reverse (12103313111), we get a palindrome (23234643232).

The spelling of 11131330121 in words is "eleven billion, one hundred thirty-one million, three hundred thirty thousand, one hundred twenty-one".