12188642441 has 4 divisors (see below), whose sum is σ = 12277610772. Its totient is φ = 12099674112.

The previous prime is 12188642437. The next prime is 12188642447. The reversal of 12188642441 is 14424688121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14424688121 = 9931 ⋅1452491.

It can be written as a sum of positive squares in 2 ways, for example, as 4874972041 + 7313670400 = 69821^2 + 85520^2 .

It is a cyclic number.

It is not a de Polignac number, because 12188642441 - 2² = 12188642437 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12188642447) 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, 44483960 + ... + 44484233.

It is an arithmetic number, because the mean of its divisors is an integer number (3069402693).

Almost surely, 2^12188642441 is an apocalyptic number.

It is an amenable number.

12188642441 is a deficient number, since it is larger than the sum of its proper divisors (88968331).

12188642441 is an equidigital number, since it uses as much as digits as its factorization.

12188642441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88968330.

The product of its digits is 98304, while the sum is 41.

The spelling of 12188642441 in words is "twelve billion, one hundred eighty-eight million, six hundred forty-two thousand, four hundred forty-one".