12315245120161 has 4 divisors (see below), whose sum is σ = 12850690560192. Its totient is φ = 11779799680132.

The previous prime is 12315245120119. The next prime is 12315245120177. The reversal of 12315245120161 is 16102154251321.

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 not a de Polignac number, because 12315245120161 - 2²⁵ = 12315211565729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12315245121161) 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, 267722719981 + ... + 267722720026.

It is an arithmetic number, because the mean of its divisors is an integer number (3212672640048).

Almost surely, 2^{12315245120161} is an apocalyptic number.

It is an amenable number.

12315245120161 is a deficient number, since it is larger than the sum of its proper divisors (535445440031).

12315245120161 is an equidigital number, since it uses as much as digits as its factorization.

12315245120161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535445440030.

The product of its (nonzero) digits is 14400, while the sum is 34.

Adding to 12315245120161 its reverse (16102154251321), we get a palindrome (28417399371482).

The spelling of 12315245120161 in words is "twelve trillion, three hundred fifteen billion, two hundred forty-five million, one hundred twenty thousand, one hundred sixty-one".