11520961121 has 2 divisors, whose sum is σ = 11520961122. Its totient is φ = 11520961120.

The previous prime is 11520961103. The next prime is 11520961171. The reversal of 11520961121 is 12116902511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11116750096 + 404211025 = 105436^2 + 20105^2 .

It is a cyclic number.

It is not a de Polignac number, because 11520961121 - 2¹⁰ = 11520960097 is a prime.

It is not a weakly prime, because it can be changed into another prime (11520961171) 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, 5760480560 + 5760480561.

It is an arithmetic number, because the mean of its divisors is an integer number (5760480561).

Almost surely, 2^11520961121 is an apocalyptic number.

It is an amenable number.

11520961121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11520961121 is an equidigital number, since it uses as much as digits as its factorization.

11520961121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 29.

The spelling of 11520961121 in words is "eleven billion, five hundred twenty million, nine hundred sixty-one thousand, one hundred twenty-one".