12421405320640 has 112 divisors (see below), whose sum is σ = 29671701989472. Its totient is φ = 4952909152256.

The previous prime is 12421405320601. The next prime is 12421405320659. The reversal of 12421405320640 is 4602350412421.

It is a junction number, because it is equal to n+sod(n) for n = 12421405320596 and 12421405320605.

It is a congruent number.

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, 481567584 + ... + 481593376.

Almost surely, 2^{12421405320640} is an apocalyptic number.

12421405320640 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 12421405320640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14835850994736).

12421405320640 is an abundant number, since it is smaller than the sum of its proper divisors (17250296668832).

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

12421405320640 is a wasteful number, since it uses less digits than its factorization.

12421405320640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30494 (or 30484 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 34.

The spelling of 12421405320640 in words is "twelve trillion, four hundred twenty-one billion, four hundred five million, three hundred twenty thousand, six hundred forty".