12421332001540 has 72 divisors (see below), whose sum is σ = 33102043232832. Its totient is φ = 3871583997120.

The previous prime is 12421332001459. The next prime is 12421332001571. The reversal of 12421332001540 is 4510023312421.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 12421332001499 and 12421332001508.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 576117792 + ... + 576139351.

It is an arithmetic number, because the mean of its divisors is an integer number (459750600456).

Almost surely, 2^{12421332001540} is an apocalyptic number.

12421332001540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12421332001540 is an abundant number, since it is smaller than the sum of its proper divisors (20680711231292).

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

12421332001540 is a wasteful number, since it uses less digits than its factorization.

12421332001540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152257177 (or 1152257168 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 12421332001540 its reverse (4510023312421), we get a palindrome (16931355313961).

The spelling of 12421332001540 in words is "twelve trillion, four hundred twenty-one billion, three hundred thirty-two million, one thousand, five hundred forty".