1179209109121 has 4 divisors (see below), whose sum is σ = 1248574350852. Its totient is φ = 1109843867392.

The previous prime is 1179209109109. The next prime is 1179209109139. The reversal of 1179209109121 is 1219019029711.

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 404923504896 + 774285604225 = 636336^2 + 879935^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1179209109121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1179209149121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34682620840 + ... + 34682620873.

It is an arithmetic number, because the mean of its divisors is an integer number (312143587713).

Almost surely, 2^{1179209109121} is an apocalyptic number.

It is an amenable number.

1179209109121 is a deficient number, since it is larger than the sum of its proper divisors (69365241731).

1179209109121 is an equidigital number, since it uses as much as digits as its factorization.

1179209109121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69365241730.

The product of its (nonzero) digits is 20412, while the sum is 43.

The spelling of 1179209109121 in words is "one trillion, one hundred seventy-nine billion, two hundred nine million, one hundred nine thousand, one hundred twenty-one".