12136452161 has 4 divisors (see below), whose sum is σ = 12342154800. Its totient is φ = 11930749524.

The previous prime is 12136452157. The next prime is 12136452191. The reversal of 12136452161 is 16125463121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16125463121 = 48179 ⋅334699.

It is a cyclic number.

It is not a de Polignac number, because 12136452161 - 2² = 12136452157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12136452191) 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, 102851231 + ... + 102851348.

It is an arithmetic number, because the mean of its divisors is an integer number (3085538700).

Almost surely, 2^12136452161 is an apocalyptic number.

It is an amenable number.

12136452161 is a deficient number, since it is larger than the sum of its proper divisors (205702639).

12136452161 is an equidigital number, since it uses as much as digits as its factorization.

12136452161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205702638.

The product of its digits is 8640, while the sum is 32.

The spelling of 12136452161 in words is "twelve billion, one hundred thirty-six million, four hundred fifty-two thousand, one hundred sixty-one".