12321431146505 has 32 divisors (see below), whose sum is σ = 16438313041920. Its totient is φ = 8804540874240.

The previous prime is 12321431146501. The next prime is 12321431146511. The reversal of 12321431146505 is 50564113412321.

It is not a de Polignac number, because 12321431146505 - 2² = 12321431146501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12321431146501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20986829 + ... + 21565941.

It is an arithmetic number, because the mean of its divisors is an integer number (513697282560).

Almost surely, 2^{12321431146505} is an apocalyptic number.

It is an amenable number.

12321431146505 is a deficient number, since it is larger than the sum of its proper divisors (4116881895415).

12321431146505 is a wasteful number, since it uses less digits than its factorization.

12321431146505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589721.

The product of its (nonzero) digits is 86400, while the sum is 38.

Adding to 12321431146505 its reverse (50564113412321), we get a palindrome (62885544558826).

The spelling of 12321431146505 in words is "twelve trillion, three hundred twenty-one billion, four hundred thirty-one million, one hundred forty-six thousand, five hundred five".