12111321204 has 72 divisors (see below), whose sum is σ = 31861516960. Its totient is φ = 4022750304.

The previous prime is 12111321199. The next prime is 12111321217. The reversal of 12111321204 is 40212311121.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 253062 + ... + 297090.

Almost surely, 2^12111321204 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 12111321204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15930758480).

12111321204 is an abundant number, since it is smaller than the sum of its proper divisors (19750195756).

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

12111321204 is a wasteful number, since it uses less digits than its factorization.

12111321204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44331 (or 44317 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 12111321204 its reverse (40212311121), we get a palindrome (52323632325).

The spelling of 12111321204 in words is "twelve billion, one hundred eleven million, three hundred twenty-one thousand, two hundred four".