12713247121 has 4 divisors (see below), whose sum is σ = 12760159744. Its totient is φ = 12666334500.

The previous prime is 12713247109. The next prime is 12713247167. The reversal of 12713247121 is 12174231721.

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 12713247121 - 2⁵ = 12713247089 is a prime.

It is a super-2 number, since 2×12713247121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12713247221) 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, 23455905 + ... + 23456446.

It is an arithmetic number, because the mean of its divisors is an integer number (3190039936).

Almost surely, 2^12713247121 is an apocalyptic number.

It is an amenable number.

12713247121 is a deficient number, since it is larger than the sum of its proper divisors (46912623).

12713247121 is an equidigital number, since it uses as much as digits as its factorization.

12713247121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46912622.

The product of its digits is 4704, while the sum is 31.

Adding to 12713247121 its reverse (12174231721), we get a palindrome (24887478842).

The spelling of 12713247121 in words is "twelve billion, seven hundred thirteen million, two hundred forty-seven thousand, one hundred twenty-one".