12501533443120 has 20 divisors (see below), whose sum is σ = 29066065255440. Its totient is φ = 5000613377216.

The previous prime is 12501533443117. The next prime is 12501533443123. The reversal of 12501533443120 is 2134433510521.

It is an interprime number because it is at equal distance from previous prime (12501533443117) and next prime (12501533443123).

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (12501533443123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78134583940 + ... + 78134584099.

It is an arithmetic number, because the mean of its divisors is an integer number (1453303262772).

Almost surely, 2^{12501533443120} is an apocalyptic number.

12501533443120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12501533443120 is an abundant number, since it is smaller than the sum of its proper divisors (16564531812320).

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

12501533443120 is a wasteful number, since it uses less digits than its factorization.

12501533443120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156269168052 (or 156269168046 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 12501533443120 its reverse (2134433510521), we get a palindrome (14635966953641).

The spelling of 12501533443120 in words is "twelve trillion, five hundred one billion, five hundred thirty-three million, four hundred forty-three thousand, one hundred twenty".