12120105615 has 8 divisors (see below), whose sum is σ = 19392169008. Its totient is φ = 6464056320.

The previous prime is 12120105607. The next prime is 12120105617. The reversal of 12120105615 is 51650102121.

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

It is not a de Polignac number, because 12120105615 - 2³ = 12120105607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120105617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404003506 + ... + 404003535.

It is an arithmetic number, because the mean of its divisors is an integer number (2424021126).

Almost surely, 2^12120105615 is an apocalyptic number.

12120105615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12120105615 is a deficient number, since it is larger than the sum of its proper divisors (7272063393).

12120105615 is an equidigital number, since it uses as much as digits as its factorization.

12120105615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808007049.

The product of its (nonzero) digits is 600, while the sum is 24.

Adding to 12120105615 its reverse (51650102121), we get a palindrome (63770207736).

The spelling of 12120105615 in words is "twelve billion, one hundred twenty million, one hundred five thousand, six hundred fifteen".