12356345271 has 4 divisors (see below), whose sum is σ = 16475127032. Its totient is φ = 8237563512.

The previous prime is 12356345227. The next prime is 12356345299. The reversal of 12356345271 is 17254365321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17254365321 = 3 ⋅5751455107.

It is not a de Polignac number, because 12356345271 - 2¹³ = 12356337079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12356345371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2059390876 + ... + 2059390881.

It is an arithmetic number, because the mean of its divisors is an integer number (4118781758).

Almost surely, 2^12356345271 is an apocalyptic number.

12356345271 is a deficient number, since it is larger than the sum of its proper divisors (4118781761).

12356345271 is an equidigital number, since it uses as much as digits as its factorization.

12356345271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4118781760.

The product of its digits is 151200, while the sum is 39.

The spelling of 12356345271 in words is "twelve billion, three hundred fifty-six million, three hundred forty-five thousand, two hundred seventy-one".