12510121301440 has 336 divisors, whose sum is σ = 36405669957120. Its totient is φ = 4010113843200.

The previous prime is 12510121301417. The next prime is 12510121301441. The reversal of 12510121301440 is 4410312101521.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12510121301441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 97687371 + ... + 97815349.

Almost surely, 2^{12510121301440} is an apocalyptic number.

12510121301440 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 12510121301440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18202834978560).

12510121301440 is an abundant number, since it is smaller than the sum of its proper divisors (23895548655680).

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

12510121301440 is a wasteful number, since it uses less digits than its factorization.

12510121301440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128188 (or 128161 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 12510121301440 its reverse (4410312101521), we get a palindrome (16920433402961).

The spelling of 12510121301440 in words is "twelve trillion, five hundred ten billion, one hundred twenty-one million, three hundred one thousand, four hundred forty".