12321403161534 has 240 divisors, whose sum is σ = 28799474492448. Its totient is φ = 3937047120000.

The previous prime is 12321403161499. The next prime is 12321403161547. The reversal of 12321403161534 is 43516130412321.

12321403161534 is a `hidden beast` number, since 1 + 2 + 3 + 2 + 1 + 4 + 0 + 3 + 1 + 615 + 34 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 13093945504 + ... + 13093946444.

Almost surely, 2^{12321403161534} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12321403161534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14399737246224).

12321403161534 is an abundant number, since it is smaller than the sum of its proper divisors (16478071330914).

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

12321403161534 is a wasteful number, since it uses less digits than its factorization.

12321403161534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1725 (or 1685 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Adding to 12321403161534 its reverse (43516130412321), we get a palindrome (55837533573855).

The spelling of 12321403161534 in words is "twelve trillion, three hundred twenty-one billion, four hundred three million, one hundred sixty-one thousand, five hundred thirty-four".