12512021522 has 192 divisors, whose sum is σ = 28109773440. Its totient is φ = 4086835200.

The previous prime is 12512021521. The next prime is 12512021579. The reversal of 12512021522 is 22512021521.

It is not an unprimeable number, because it can be changed into a prime (12512021521) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6907997 + ... + 6909807.

It is an arithmetic number, because the mean of its divisors is an integer number (146405070).

Almost surely, 2^12512021522 is an apocalyptic number.

12512021522 is an abundant number, since it is smaller than the sum of its proper divisors (15597751918).

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

12512021522 is a wasteful number, since it uses less digits than its factorization.

12512021522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897 (or 1890 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

Subtracting 12512021522 from its reverse (22512021521), we obtain a palindrome (9999999999).

The spelling of 12512021522 in words is "twelve billion, five hundred twelve million, twenty-one thousand, five hundred twenty-two".