12251521140 has 24 divisors (see below), whose sum is σ = 34304259360. Its totient is φ = 3267072288.

The previous prime is 12251521123. The next prime is 12251521147. The reversal of 12251521140 is 4112515221.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12251521140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12251521147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102095950 + ... + 102096069.

It is an arithmetic number, because the mean of its divisors is an integer number (1429344140).

Almost surely, 2^12251521140 is an apocalyptic number.

12251521140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12251521140 is an abundant number, since it is smaller than the sum of its proper divisors (22052738220).

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

12251521140 is a wasteful number, since it uses less digits than its factorization.

12251521140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204192031 (or 204192029 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The spelling of 12251521140 in words is "twelve billion, two hundred fifty-one million, five hundred twenty-one thousand, one hundred forty".