12421231056780 has 384 divisors, whose sum is σ = 43123991500800. Its totient is φ = 2616773372928.

The previous prime is 12421231056757. The next prime is 12421231056821. The reversal of 12421231056780 is 8765013212421.

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

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 630221566 + ... + 630241274.

It is an arithmetic number, because the mean of its divisors is an integer number (112302061200).

Almost surely, 2^{12421231056780} is an apocalyptic number.

12421231056780 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 12421231056780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21561995750400).

12421231056780 is an abundant number, since it is smaller than the sum of its proper divisors (30702760444020).

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

12421231056780 is a wasteful number, since it uses less digits than its factorization.

12421231056780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20450 (or 20422 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 12421231056780 in words is "twelve trillion, four hundred twenty-one billion, two hundred thirty-one million, fifty-six thousand, seven hundred eighty".