12120205015505 has 8 divisors (see below), whose sum is σ = 14554642200000. Its totient is φ = 9689233224816.

The previous prime is 12120205015481. The next prime is 12120205015549. The reversal of 12120205015505 is 50551050202121.

12120205015505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12120205015505 - 2⁸ = 12120205015249 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 866340755 + ... + 866354744.

It is an arithmetic number, because the mean of its divisors is an integer number (1819330275000).

Almost surely, 2^{12120205015505} is an apocalyptic number.

It is an amenable number.

12120205015505 is a deficient number, since it is larger than the sum of its proper divisors (2434437184495).

12120205015505 is a wasteful number, since it uses less digits than its factorization.

12120205015505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1732696903.

The product of its (nonzero) digits is 5000, while the sum is 29.

Adding to 12120205015505 its reverse (50551050202121), we get a palindrome (62671255217626).

The spelling of 12120205015505 in words is "twelve trillion, one hundred twenty billion, two hundred five million, fifteen thousand, five hundred five".