12011056505 has 8 divisors (see below), whose sum is σ = 16472306112. Its totient is φ = 8236153008.

The previous prime is 12011056493. The next prime is 12011056523. The reversal of 12011056505 is 50565011021.

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 12011056505 - 2⁴ = 12011056489 is a prime.

It is a Duffinian 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, 171586487 + ... + 171586556.

It is an arithmetic number, because the mean of its divisors is an integer number (2059038264).

Almost surely, 2^12011056505 is an apocalyptic number.

It is an amenable number.

12011056505 is a deficient number, since it is larger than the sum of its proper divisors (4461249607).

12011056505 is an equidigital number, since it uses as much as digits as its factorization.

12011056505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343173055.

The product of its (nonzero) digits is 1500, while the sum is 26.

Adding to 12011056505 its reverse (50565011021), we get a palindrome (62576067526).

The spelling of 12011056505 in words is "twelve billion, eleven million, fifty-six thousand, five hundred five".