12813242161 has 4 divisors (see below), whose sum is σ = 12837742192. Its totient is φ = 12788742132.

The previous prime is 12813242137. The next prime is 12813242177. The reversal of 12813242161 is 16124231821.

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 12813242161 - 2⁷ = 12813242033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12813242861) 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, 12249231 + ... + 12250276.

It is an arithmetic number, because the mean of its divisors is an integer number (3209435548).

Almost surely, 2^12813242161 is an apocalyptic number.

It is an amenable number.

12813242161 is a deficient number, since it is larger than the sum of its proper divisors (24500031).

12813242161 is an equidigital number, since it uses as much as digits as its factorization.

12813242161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24500030.

The product of its digits is 4608, while the sum is 31.

Adding to 12813242161 its reverse (16124231821), we get a palindrome (28937473982).

The spelling of 12813242161 in words is "twelve billion, eight hundred thirteen million, two hundred forty-two thousand, one hundred sixty-one".