12121513521530 has 192 divisors, whose sum is σ = 26882493580800. Its totient is φ = 3912842142720.

The previous prime is 12121513521503. The next prime is 12121513521563. The reversal of 12121513521530 is 3512531512121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1905595550 + ... + 1905601910.

It is an arithmetic number, because the mean of its divisors is an integer number (140012987400).

Almost surely, 2^{12121513521530} is an apocalyptic number.

12121513521530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121513521530 is an abundant number, since it is smaller than the sum of its proper divisors (14760980059270).

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

12121513521530 is a wasteful number, since it uses less digits than its factorization.

12121513521530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7637 (or 7630 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 32.

The spelling of 12121513521530 in words is "twelve trillion, one hundred twenty-one billion, five hundred thirteen million, five hundred twenty-one thousand, five hundred thirty".