12204131520 has 112 divisors (see below), whose sum is σ = 44283587328. Its totient is φ = 2789514240.

The previous prime is 12204131503. The next prime is 12204131557. The reversal of 12204131520 is 2513140221.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 901326 + ... + 914765.

Almost surely, 2^12204131520 is an apocalyptic number.

12204131520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12204131520 is an abundant number, since it is smaller than the sum of its proper divisors (32079455808).

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

12204131520 is a wasteful number, since it uses less digits than its factorization.

12204131520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1816118 (or 1816108 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 12204131520 its reverse (2513140221), we get a palindrome (14717271741).

The spelling of 12204131520 in words is "twelve billion, two hundred four million, one hundred thirty-one thousand, five hundred twenty".