12011056506 has 12 divisors (see below), whose sum is σ = 26023955802. Its totient is φ = 4003685496.

The previous prime is 12011056493. The next prime is 12011056523. The reversal of 12011056506 is 60565011021.

It is a happy number.

12011056506 is a `hidden beast` number, since 1 + 2 + 0 + 1 + 1 + 0 + 5 + 650 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12000107025 + 10949481 = 109545^2 + 3309^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12011056506.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 333640441 + ... + 333640476.

Almost surely, 2^12011056506 is an apocalyptic number.

12011056506 is an abundant number, since it is smaller than the sum of its proper divisors (14012899296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12011056506 is a wasteful number, since it uses less digits than its factorization.

12011056506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667280925 (or 667280922 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

Adding to 12011056506 its reverse (60565011021), we get a palindrome (72576067527).

The spelling of 12011056506 in words is "twelve billion, eleven million, fifty-six thousand, five hundred six".