12231121100 has 72 divisors (see below), whose sum is σ = 28987988400. Its totient is φ = 4442521600.

The previous prime is 12231121051. The next prime is 12231121129. The reversal of 12231121100 is 112113221.

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, 1015916 + ... + 1027884.

It is an arithmetic number, because the mean of its divisors is an integer number (402610950).

Almost surely, 2^12231121100 is an apocalyptic number.

12231121100 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 12231121100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14493994200).

12231121100 is an abundant number, since it is smaller than the sum of its proper divisors (16756867300).

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

12231121100 is a wasteful number, since it uses less digits than its factorization.

12231121100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12923 (or 12916 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12231121100 its reverse (112113221), we get a palindrome (12343234321).

It can be divided in two parts, 12231 and 121100, that added together give a palindrome (133331).

The spelling of 12231121100 in words is "twelve billion, two hundred thirty-one million, one hundred twenty-one thousand, one hundred".