12505224140 has 24 divisors (see below), whose sum is σ = 27805734432. Its totient is φ = 4707848960.

The previous prime is 12505224119. The next prime is 12505224187. The reversal of 12505224140 is 4142250521.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18389696 + ... + 18390375.

It is an arithmetic number, because the mean of its divisors is an integer number (1158572268).

Almost surely, 2^12505224140 is an apocalyptic number.

12505224140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12505224140 is an abundant number, since it is smaller than the sum of its proper divisors (15300510292).

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

12505224140 is a wasteful number, since it uses less digits than its factorization.

12505224140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36780097 (or 36780095 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 12505224140 its reverse (4142250521), we get a palindrome (16647474661).

The spelling of 12505224140 in words is "twelve billion, five hundred five million, two hundred twenty-four thousand, one hundred forty".