12201231204 has 72 divisors (see below), whose sum is σ = 32169621120. Its totient is φ = 4043512224.

The previous prime is 12201231173. The next prime is 12201231247. The reversal of 12201231204 is 40213210221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131877 + ... + 204435.

Almost surely, 2^12201231204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12201231204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16084810560).

12201231204 is an abundant number, since it is smaller than the sum of its proper divisors (19968389916).

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

12201231204 is a wasteful number, since it uses less digits than its factorization.

12201231204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72751 (or 72737 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 12201231204 its reverse (40213210221), we get a palindrome (52414441425).

The spelling of 12201231204 in words is "twelve billion, two hundred one million, two hundred thirty-one thousand, two hundred four".