12179697121 has 4 divisors (see below), whose sum is σ = 12180065044. Its totient is φ = 12179329200.

The previous prime is 12179697083. The next prime is 12179697133.

12179697121 is nontrivially palindromic in base 10.

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 4914010000 + 7265687121 = 70100^2 + 85239^2 .

It is a cyclic number.

It is not a de Polignac number, because 12179697121 - 2⁷ = 12179696993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12179697151) 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, 128790 + ... + 202351.

It is an arithmetic number, because the mean of its divisors is an integer number (3045016261).

Almost surely, 2^12179697121 is an apocalyptic number.

It is an amenable number.

12179697121 is a deficient number, since it is larger than the sum of its proper divisors (367923).

12179697121 is an equidigital number, since it uses as much as digits as its factorization.

12179697121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367922.

The product of its digits is 95256, while the sum is 46.

The spelling of 12179697121 in words is "twelve billion, one hundred seventy-nine million, six hundred ninety-seven thousand, one hundred twenty-one".