12115245243 has 4 divisors (see below), whose sum is σ = 16153660328. Its totient is φ = 8076830160.

The previous prime is 12115245217. The next prime is 12115245269. The reversal of 12115245243 is 34254251121.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12115245217) and next prime (12115245269).

It is not a de Polignac number, because 12115245243 - 2⁶ = 12115245179 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12115245243.

It is not an unprimeable number, because it can be changed into a prime (12115245203) 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, 2019207538 + ... + 2019207543.

It is an arithmetic number, because the mean of its divisors is an integer number (4038415082).

Almost surely, 2^12115245243 is an apocalyptic number.

12115245243 is a deficient number, since it is larger than the sum of its proper divisors (4038415085).

12115245243 is an equidigital number, since it uses as much as digits as its factorization.

12115245243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4038415084.

The product of its digits is 9600, while the sum is 30.

Adding to 12115245243 its reverse (34254251121), we get a palindrome (46369496364).

The spelling of 12115245243 in words is "twelve billion, one hundred fifteen million, two hundred forty-five thousand, two hundred forty-three".