12521606370 has 128 divisors (see below), whose sum is σ = 38262551040. Its totient is φ = 2550804480.

The previous prime is 12521606333. The next prime is 12521606371. The reversal of 12521606370 is 7360612521.

It is not an unprimeable number, because it can be changed into a prime (12521606371) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 90 + ... + 158250.

It is an arithmetic number, because the mean of its divisors is an integer number (298926180).

Almost surely, 2^12521606370 is an apocalyptic number.

12521606370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12521606370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19131275520).

12521606370 is an abundant number, since it is smaller than the sum of its proper divisors (25740944670).

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

12521606370 is a wasteful number, since it uses less digits than its factorization.

12521606370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158220.

The product of its (nonzero) digits is 15120, while the sum is 33.

The spelling of 12521606370 in words is "twelve billion, five hundred twenty-one million, six hundred six thousand, three hundred seventy".