12415142120321 has 4 divisors (see below), whose sum is σ = 12416707127892. Its totient is φ = 12413577112752.

The previous prime is 12415142120309. The next prime is 12415142120323. The reversal of 12415142120321 is 12302124151421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5505893303296 + 6909248817025 = 2346464^2 + 2628545^2 .

It is a cyclic number.

It is not a de Polignac number, because 12415142120321 - 2⁶ = 12415142120257 is a prime.

It is a super-2 number, since 2×12415142120321² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12415142120323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 782491886 + ... + 782507751.

It is an arithmetic number, because the mean of its divisors is an integer number (3104176781973).

Almost surely, 2^{12415142120321} is an apocalyptic number.

It is an amenable number.

12415142120321 is a deficient number, since it is larger than the sum of its proper divisors (1565007571).

12415142120321 is an equidigital number, since it uses as much as digits as its factorization.

12415142120321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565007570.

The product of its (nonzero) digits is 3840, while the sum is 29.

Adding to 12415142120321 its reverse (12302124151421), we get a palindrome (24717266271742).

The spelling of 12415142120321 in words is "twelve trillion, four hundred fifteen billion, one hundred forty-two million, one hundred twenty thousand, three hundred twenty-one".