12115212506 has 8 divisors (see below), whose sum is σ = 18360167700. Its totient is φ = 5995156608.

The previous prime is 12115212481. The next prime is 12115212509. The reversal of 12115212506 is 60521251121.

It can be written as a sum of positive squares in 2 ways, for example, as 12079988281 + 35224225 = 109909^2 + 5935^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12115212509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31224581 + ... + 31224968.

Almost surely, 2^12115212506 is an apocalyptic number.

12115212506 is a deficient number, since it is larger than the sum of its proper divisors (6244955194).

12115212506 is an equidigital number, since it uses as much as digits as its factorization.

12115212506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62449648.

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 12115212506 its reverse (60521251121), we get a palindrome (72636463627).

The spelling of 12115212506 in words is "twelve billion, one hundred fifteen million, two hundred twelve thousand, five hundred six".