12203131520 has 128 divisors (see below), whose sum is σ = 30770625600. Its totient is φ = 4615004160.

The previous prime is 12203131519. The next prime is 12203131529. The reversal of 12203131520 is 2513130221.

It is a tau number, because it is divible by the number of its divisors (128).

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

It is a junction number, because it is equal to n+sod(n) for n = 12203131492 and 12203131501.

It is not an unprimeable number, because it can be changed into a prime (12203131529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10420535 + ... + 10421705.

Almost surely, 2^12203131520 is an apocalyptic number.

12203131520 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 12203131520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15385312800).

12203131520 is an abundant number, since it is smaller than the sum of its proper divisors (18567494080).

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

12203131520 is a wasteful number, since it uses less digits than its factorization.

12203131520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2066 (or 2054 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 12203131520 its reverse (2513130221), we get a palindrome (14716261741).

The spelling of 12203131520 in words is "twelve billion, two hundred three million, one hundred thirty-one thousand, five hundred twenty".