12111203232 has 36 divisors (see below), whose sum is σ = 34441235010. Its totient is φ = 4037067648.

The previous prime is 12111203201. The next prime is 12111203243. The reversal of 12111203232 is 23230211121.

It can be written as a sum of positive squares in only one way, i.e., 12011283216 + 99920016 = 109596^2 + 9996^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21026107 + ... + 21026682.

Almost surely, 2^12111203232 is an apocalyptic number.

12111203232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12111203232 is an abundant number, since it is smaller than the sum of its proper divisors (22330031778).

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

12111203232 is a wasteful number, since it uses less digits than its factorization.

12111203232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42052805 (or 42052794 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12111203232 its reverse (23230211121), we get a palindrome (35341414353).

The spelling of 12111203232 in words is "twelve billion, one hundred eleven million, two hundred three thousand, two hundred thirty-two".