120005240115505 has 4 divisors (see below), whose sum is σ = 144006288138612. Its totient is φ = 96004192092400.

The previous prime is 120005240115469. The next prime is 120005240115611. The reversal of 120005240115505 is 505511042500021.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25469211170209 + 94536028945296 = 5046703^2 + 9722964^2 .

It is not a de Polignac number, because 120005240115505 - 2⁴⁵ = 84820868026673 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12000524011546 + ... + 12000524011555.

It is an arithmetic number, because the mean of its divisors is an integer number (36001572034653).

Almost surely, 2^{120005240115505} is an apocalyptic number.

It is an amenable number.

120005240115505 is a deficient number, since it is larger than the sum of its proper divisors (24001048023107).

120005240115505 is an equidigital number, since it uses as much as digits as its factorization.

120005240115505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24001048023106.

The product of its (nonzero) digits is 10000, while the sum is 31.

Adding to 120005240115505 its reverse (505511042500021), we get a palindrome (625516282615526).

The spelling of 120005240115505 in words is "one hundred twenty trillion, five billion, two hundred forty million, one hundred fifteen thousand, five hundred five".