12021600 has 72 divisors (see below), whose sum is σ = 39138120. Its totient is φ = 3205120.

The previous prime is 12021593. The next prime is 12021629. The reversal of 12021600 is 612021.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105 + ... + 4904.

It is an arithmetic number, because the mean of its divisors is an integer number (543585).

Almost surely, 2^12021600 is an apocalyptic number.

12021600 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 12021600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19569060).

12021600 is an abundant number, since it is smaller than the sum of its proper divisors (27116520).

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

12021600 is a wasteful number, since it uses less digits than its factorization.

12021600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5032 (or 5019 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 12021600 is about 3467.2179048915. The cubic root of 12021600 is about 229.0801318827.

Adding to 12021600 its reverse (612021), we get a palindrome (12633621).

It can be divided in two parts, 12021 and 600, that added together give a palindrome (12621).

The spelling of 12021600 in words is "twelve million, twenty-one thousand, six hundred".