11165561129 has 2 divisors, whose sum is σ = 11165561130. Its totient is φ = 11165561128.

The previous prime is 11165561107. The next prime is 11165561167. The reversal of 11165561129 is 92116556111.

It is an a-pointer prime, because the next prime (11165561167) can be obtained adding 11165561129 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10888505104 + 277056025 = 104348^2 + 16645^2 .

It is a cyclic number.

It is not a de Polignac number, because 11165561129 - 2²⁰ = 11164512553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11165561092 and 11165561101.

It is not a weakly prime, because it can be changed into another prime (11165561629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5582780564 + 5582780565.

It is an arithmetic number, because the mean of its divisors is an integer number (5582780565).

Almost surely, 2^11165561129 is an apocalyptic number.

It is an amenable number.

11165561129 is a deficient number, since it is larger than the sum of its proper divisors (1).

11165561129 is an equidigital number, since it uses as much as digits as its factorization.

11165561129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 38.

The spelling of 11165561129 in words is "eleven billion, one hundred sixty-five million, five hundred sixty-one thousand, one hundred twenty-nine".