12321403161550 has 48 divisors (see below), whose sum is σ = 26367566608800. Its totient is φ = 4196128844160.

The previous prime is 12321403161547. The next prime is 12321403161563. The reversal of 12321403161550 is 5516130412321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 118082109 + ... + 118186408.

It is an arithmetic number, because the mean of its divisors is an integer number (549324304350).

Almost surely, 2^{12321403161550} is an apocalyptic number.

12321403161550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12321403161550 is an abundant number, since it is smaller than the sum of its proper divisors (14046163447250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12321403161550 is a wasteful number, since it uses less digits than its factorization.

12321403161550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236268685 (or 236268680 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

Adding to 12321403161550 its reverse (5516130412321), we get a palindrome (17837533573871).

The spelling of 12321403161550 in words is "twelve trillion, three hundred twenty-one billion, four hundred three million, one hundred sixty-one thousand, five hundred fifty".