12012540351571 has 4 divisors (see below), whose sum is σ = 12019277616592. Its totient is φ = 12005803086552.

The previous prime is 12012540351541. The next prime is 12012540351607. The reversal of 12012540351571 is 17515304521021.

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

It is a cyclic number.

It is not a de Polignac number, because 12012540351571 - 2¹⁹ = 12012539827283 is a prime.

It is a super-2 number, since 2×12012540351571² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12012540351571.

It is not an unprimeable number, because it can be changed into a prime (12012540351541) by changing a digit.

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, 3368629836 + ... + 3368633401.

It is an arithmetic number, because the mean of its divisors is an integer number (3004819404148).

Almost surely, 2^{12012540351571} is an apocalyptic number.

12012540351571 is a deficient number, since it is larger than the sum of its proper divisors (6737265021).

12012540351571 is an equidigital number, since it uses as much as digits as its factorization.

12012540351571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6737265020.

The product of its (nonzero) digits is 42000, while the sum is 37.

Adding to 12012540351571 its reverse (17515304521021), we get a palindrome (29527844872592).

The spelling of 12012540351571 in words is "twelve trillion, twelve billion, five hundred forty million, three hundred fifty-one thousand, five hundred seventy-one".