12412105313521 has 8 divisors (see below), whose sum is σ = 12542563177704. Its totient is φ = 12281698429440.

The previous prime is 12412105313519. The next prime is 12412105313533. The reversal of 12412105313521 is 12531350121421.

12412105313521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1339609482225 + 11072495831296 = 1157415^2 + 3327536^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12412105313521 - 2¹ = 12412105313519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12412105313551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12255430 + ... + 13229503.

It is an arithmetic number, because the mean of its divisors is an integer number (1567820397213).

Almost surely, 2^{12412105313521} is an apocalyptic number.

It is an amenable number.

12412105313521 is a deficient number, since it is larger than the sum of its proper divisors (130457864183).

12412105313521 is an equidigital number, since it uses as much as digits as its factorization.

12412105313521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25490051.

The product of its (nonzero) digits is 7200, while the sum is 31.

Adding to 12412105313521 its reverse (12531350121421), we get a palindrome (24943455434942).

The spelling of 12412105313521 in words is "twelve trillion, four hundred twelve billion, one hundred five million, three hundred thirteen thousand, five hundred twenty-one".