12521232330 has 32 divisors (see below), whose sum is σ = 30054024000. Its totient is φ = 3338654592.

The previous prime is 12521232323. The next prime is 12521232349. The reversal of 12521232330 is 3323212521.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12521232330.

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 15 ways as a sum of consecutive naturals, for example, 445021 + ... + 472319.

It is an arithmetic number, because the mean of its divisors is an integer number (939188250).

Almost surely, 2^12521232330 is an apocalyptic number.

12521232330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12521232330 is an abundant number, since it is smaller than the sum of its proper divisors (17532791670).

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

12521232330 is a wasteful number, since it uses less digits than its factorization.

12521232330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42598.

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 12521232330 its reverse (3323212521), we get a palindrome (15844444851).

The spelling of 12521232330 in words is "twelve billion, five hundred twenty-one million, two hundred thirty-two thousand, three hundred thirty".