12127747697 has 4 divisors (see below), whose sum is σ = 13060651380. Its totient is φ = 11194844016.

The previous prime is 12127747663. The next prime is 12127747699. The reversal of 12127747697 is 79674772121.

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 2468003041 + 9659744656 = 49679^2 + 98284^2 .

It is a cyclic number.

It is not a de Polignac number, because 12127747697 - 2²⁰ = 12126699121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12127747699) 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, 466451822 + ... + 466451847.

It is an arithmetic number, because the mean of its divisors is an integer number (3265162845).

Almost surely, 2^12127747697 is an apocalyptic number.

It is an amenable number.

12127747697 is a deficient number, since it is larger than the sum of its proper divisors (932903683).

12127747697 is an equidigital number, since it uses as much as digits as its factorization.

12127747697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932903682.

The product of its digits is 2074464, while the sum is 53.

The spelling of 12127747697 in words is "twelve billion, one hundred twenty-seven million, seven hundred forty-seven thousand, six hundred ninety-seven".