12521525320 has 32 divisors (see below), whose sum is σ = 28198755000. Its totient is φ = 5004108288.

The previous prime is 12521525299. The next prime is 12521525347. The reversal of 12521525320 is 2352512521.

It can be written as a sum of positive squares in 4 ways, for example, as 9784770724 + 2736754596 = 98918^2 + 52314^2 .

It is a super-2 number, since 2×12521525320² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95445 + ... + 184804.

Almost surely, 2^12521525320 is an apocalyptic number.

12521525320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12521525320 is an abundant number, since it is smaller than the sum of its proper divisors (15677229680).

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

12521525320 is a wasteful number, since it uses less digits than its factorization.

12521525320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281377 (or 281373 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 12521525320 in words is "twelve billion, five hundred twenty-one million, five hundred twenty-five thousand, three hundred twenty".