12321012606256 has 80 divisors (see below), whose sum is σ = 25771473734400. Its totient is φ = 5688880381184.

The previous prime is 12321012606109. The next prime is 12321012606263. The reversal of 12321012606256 is 65260621012321.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114552855 + ... + 114660361.

It is an arithmetic number, because the mean of its divisors is an integer number (322143421680).

Almost surely, 2^{12321012606256} is an apocalyptic number.

12321012606256 is a gapful number since it is divisible by the number (16) 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 12321012606256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12885736867200).

12321012606256 is an abundant number, since it is smaller than the sum of its proper divisors (13450461128144).

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

12321012606256 is a wasteful number, since it uses less digits than its factorization.

12321012606256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118306 (or 118300 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

Adding to 12321012606256 its reverse (65260621012321), we get a palindrome (77581633618577).

The spelling of 12321012606256 in words is "twelve trillion, three hundred twenty-one billion, twelve million, six hundred six thousand, two hundred fifty-six".