12405042315231 has 4 divisors (see below), whose sum is σ = 16540056420312. Its totient is φ = 8270028210152.

The previous prime is 12405042315227. The next prime is 12405042315247. The reversal of 12405042315231 is 13251324050421.

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

It is a cyclic number.

It is not a de Polignac number, because 12405042315231 - 2² = 12405042315227 is a prime.

It is a super-2 number, since 2×12405042315231² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12405042315192 and 12405042315201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12405042315431) 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, 2067507052536 + ... + 2067507052541.

It is an arithmetic number, because the mean of its divisors is an integer number (4135014105078).

Almost surely, 2^{12405042315231} is an apocalyptic number.

12405042315231 is a deficient number, since it is larger than the sum of its proper divisors (4135014105081).

12405042315231 is an equidigital number, since it uses as much as digits as its factorization.

12405042315231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4135014105080.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 12405042315231 its reverse (13251324050421), we get a palindrome (25656366365652).

The spelling of 12405042315231 in words is "twelve trillion, four hundred five billion, forty-two million, three hundred fifteen thousand, two hundred thirty-one".