12127435697309 has 4 divisors (see below), whose sum is σ = 12518643300480. Its totient is φ = 11736228094140.

The previous prime is 12127435697303. The next prime is 12127435697353. The reversal of 12127435697309 is 90379653472121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12127435697309 - 2²⁴ = 12127418920093 is a prime.

It is a super-4 number, since 4×12127435697309⁴ (a number of 53 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12127435697303) 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, 195603801539 + ... + 195603801600.

It is an arithmetic number, because the mean of its divisors is an integer number (3129660825120).

Almost surely, 2^{12127435697309} is an apocalyptic number.

It is an amenable number.

12127435697309 is a deficient number, since it is larger than the sum of its proper divisors (391207603171).

12127435697309 is an equidigital number, since it uses as much as digits as its factorization.

12127435697309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391207603170.

The product of its (nonzero) digits is 17146080, while the sum is 59.

The spelling of 12127435697309 in words is "twelve trillion, one hundred twenty-seven billion, four hundred thirty-five million, six hundred ninety-seven thousand, three hundred nine".