12021300 has 162 divisors, whose sum is σ = 40842438. Its totient is φ = 2954880.

The previous prime is 12021299. The next prime is 12021311. The reversal of 12021300 is 312021.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2547216 + 9474084 = 1596^2 + 3078^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 324882 + ... + 324918.

Almost surely, 2^12021300 is an apocalyptic number.

12021300 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 12021300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20421219).

12021300 is an abundant number, since it is smaller than the sum of its proper divisors (28821138).

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

12021300 is a wasteful number, since it uses less digits than its factorization.

12021300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 12021300 is about 3467.1746422700. The cubic root of 12021300 is about 229.0782262957.

Adding to 12021300 its reverse (312021), we get a palindrome (12333321).

It can be divided in two parts, 12021 and 300, that added together give a palindrome (12321).

The spelling of 12021300 in words is "twelve million, twenty-one thousand, three hundred".