12071071161605 has 4 divisors (see below), whose sum is σ = 14485285393932. Its totient is φ = 9656856929280.

The previous prime is 12071071161491. The next prime is 12071071161613. The reversal of 12071071161605 is 50616117017021.

12071071161605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 5585782457476 + 6485288704129 = 2363426^2 + 2546623^2 .

It is not a de Polignac number, because 12071071161605 - 2¹⁰ = 12071071160581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1207107116156 + ... + 1207107116165.

It is an arithmetic number, because the mean of its divisors is an integer number (3621321348483).

Almost surely, 2^{12071071161605} is an apocalyptic number.

It is an amenable number.

12071071161605 is a deficient number, since it is larger than the sum of its proper divisors (2414214232327).

12071071161605 is an equidigital number, since it uses as much as digits as its factorization.

12071071161605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2414214232326.

The product of its (nonzero) digits is 17640, while the sum is 38.

Adding to 12071071161605 its reverse (50616117017021), we get a palindrome (62687188178626).

The spelling of 12071071161605 in words is "twelve trillion, seventy-one billion, seventy-one million, one hundred sixty-one thousand, six hundred five".