12521505000 has 160 divisors (see below), whose sum is σ = 39951711360. Its totient is φ = 3267840000.

The previous prime is 12521504981. The next prime is 12521505019. The reversal of 12521505000 is 50512521.

It is an interprime number because it is at equal distance from previous prime (12521504981) and next prime (12521505019).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 696120 + ... + 713880.

It is an arithmetic number, because the mean of its divisors is an integer number (249698196).

Almost surely, 2^12521505000 is an apocalyptic number.

12521505000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12521505000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19975855680).

12521505000 is an abundant number, since it is smaller than the sum of its proper divisors (27430206360).

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

12521505000 is a wasteful number, since it uses less digits than its factorization.

12521505000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17837 (or 17818 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The spelling of 12521505000 in words is "twelve billion, five hundred twenty-one million, five hundred five thousand".