12520247167 has 4 divisors (see below), whose sum is σ = 12562978680. Its totient is φ = 12477515656.

The previous prime is 12520247149. The next prime is 12520247191. The reversal of 12520247167 is 76174202521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76174202521 = 22679 ⋅3358799.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12520247167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12520247107) 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, 21365317 + ... + 21365902.

It is an arithmetic number, because the mean of its divisors is an integer number (3140744670).

Almost surely, 2^12520247167 is an apocalyptic number.

12520247167 is a deficient number, since it is larger than the sum of its proper divisors (42731513).

12520247167 is an equidigital number, since it uses as much as digits as its factorization.

12520247167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42731512.

The product of its (nonzero) digits is 47040, while the sum is 37.

Adding to 12520247167 its reverse (76174202521), we get a palindrome (88694449688).

The spelling of 12520247167 in words is "twelve billion, five hundred twenty million, two hundred forty-seven thousand, one hundred sixty-seven".