12255031304520 has 128 divisors (see below), whose sum is σ = 36994715452800. Its totient is φ = 3247615033344.

The previous prime is 12255031304519. The next prime is 12255031304563. The reversal of 12255031304520 is 2540313055221.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45100584 + ... + 45371496.

It is an arithmetic number, because the mean of its divisors is an integer number (289021214475).

Almost surely, 2^{12255031304520} is an apocalyptic number.

12255031304520 is a gapful number since it is divisible by the number (10) 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 12255031304520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18497357726400).

12255031304520 is an abundant number, since it is smaller than the sum of its proper divisors (24739684148280).

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

12255031304520 is a wasteful number, since it uses less digits than its factorization.

12255031304520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273279 (or 273275 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 12255031304520 its reverse (2540313055221), we get a palindrome (14795344359741).

The spelling of 12255031304520 in words is "twelve trillion, two hundred fifty-five billion, thirty-one million, three hundred four thousand, five hundred twenty".