12053439217 has 4 divisors (see below), whose sum is σ = 12096953716. Its totient is φ = 12009924720.

The previous prime is 12053439187. The next prime is 12053439221. The reversal of 12053439217 is 71293435021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71293435021 = 186883 ⋅381487.

It can be written as a sum of positive squares in 2 ways, for example, as 995023936 + 11058415281 = 31544^2 + 105159^2 .

It is a cyclic number.

It is not a de Polignac number, because 12053439217 - 2²³ = 12045050609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12053439257) 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, 21756834 + ... + 21757387.

It is an arithmetic number, because the mean of its divisors is an integer number (3024238429).

Almost surely, 2^12053439217 is an apocalyptic number.

It is an amenable number.

12053439217 is a deficient number, since it is larger than the sum of its proper divisors (43514499).

12053439217 is an equidigital number, since it uses as much as digits as its factorization.

12053439217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43514498.

The product of its (nonzero) digits is 45360, while the sum is 37.

The spelling of 12053439217 in words is "twelve billion, fifty-three million, four hundred thirty-nine thousand, two hundred seventeen".