11988118129 has 4 divisors (see below), whose sum is σ = 12910281076. Its totient is φ = 11065955184.

The previous prime is 11988118117. The next prime is 11988118151. The reversal of 11988118129 is 92181188911.

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 1960098529 + 10028019600 = 44273^2 + 100140^2 .

It is a cyclic number.

It is not a de Polignac number, because 11988118129 - 2¹¹ = 11988116081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11988110129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461081454 + ... + 461081479.

It is an arithmetic number, because the mean of its divisors is an integer number (3227570269).

Almost surely, 2^11988118129 is an apocalyptic number.

It is an amenable number.

11988118129 is a deficient number, since it is larger than the sum of its proper divisors (922162947).

11988118129 is an equidigital number, since it uses as much as digits as its factorization.

11988118129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922162946.

The product of its digits is 82944, while the sum is 49.

The spelling of 11988118129 in words is "eleven billion, nine hundred eighty-eight million, one hundred eighteen thousand, one hundred twenty-nine".