12231100 has 72 divisors (see below), whose sum is σ = 30810528. Its totient is φ = 4128000.

The previous prime is 12231083. The next prime is 12231133. The reversal of 12231100 is 113221.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

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, 70614 + ... + 70786.

It is an arithmetic number, because the mean of its divisors is an integer number (427924).

Almost surely, 2^12231100 is an apocalyptic number.

12231100 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 12231100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15405264).

12231100 is an abundant number, since it is smaller than the sum of its proper divisors (18579428).

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

12231100 is a wasteful number, since it uses less digits than its factorization.

12231100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 12231100 is about 3497.2989577673. The cubic root of 12231100 is about 230.4031995039.

Adding to 12231100 its reverse (113221), we get a palindrome (12344321).

The spelling of 12231100 in words is "twelve million, two hundred thirty-one thousand, one hundred".