12521045000 has 80 divisors (see below), whose sum is σ = 29378408400. Its totient is φ = 5001320000.

The previous prime is 12521044997. The next prime is 12521045021. The reversal of 12521045000 is 54012521.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4853711 + ... + 4856289.

It is an arithmetic number, because the mean of its divisors is an integer number (367230105).

Almost surely, 2^12521045000 is an apocalyptic number.

12521045000 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 12521045000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14689204200).

12521045000 is an abundant number, since it is smaller than the sum of its proper divisors (16857363400).

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

12521045000 is an equidigital number, since it uses as much as digits as its factorization.

12521045000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3576 (or 3557 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

Adding to 12521045000 its reverse (54012521), we get a palindrome (12575057521).

The spelling of 12521045000 in words is "twelve billion, five hundred twenty-one million, forty-five thousand".