12331321554552 has 256 divisors, whose sum is σ = 41395520517120. Its totient is φ = 2956298342400.

The previous prime is 12331321554491. The next prime is 12331321554571. The reversal of 12331321554552 is 25545512313321.

12331321554552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12331321554552² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 492983998 + ... + 493009010.

It is an arithmetic number, because the mean of its divisors is an integer number (161701252020).

Almost surely, 2^{12331321554552} is an apocalyptic number.

12331321554552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12331321554552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20697760258560).

12331321554552 is an abundant number, since it is smaller than the sum of its proper divisors (29064198962568).

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

12331321554552 is a wasteful number, since it uses less digits than its factorization.

12331321554552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45574 (or 45570 counting only the distinct ones).

The product of its digits is 540000, while the sum is 42.

Adding to 12331321554552 its reverse (25545512313321), we get a palindrome (37876833867873).

The spelling of 12331321554552 in words is "twelve trillion, three hundred thirty-one billion, three hundred twenty-one million, five hundred fifty-four thousand, five hundred fifty-two".