21041200 has 60 divisors (see below), whose sum is σ = 51824808. Its totient is φ = 8204800.

The previous prime is 21041191. The next prime is 21041201. The reversal of 21041200 is 214012.

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

It is not an unprimeable number, because it can be changed into a prime (21041201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15759 + ... + 17041.

Almost surely, 2^21041200 is an apocalyptic number.

21041200 is a gapful number since it is divisible by the number (20) 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 21041200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25912404).

21041200 is an abundant number, since it is smaller than the sum of its proper divisors (30783608).

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

21041200 is a wasteful number, since it uses less digits than its factorization.

21041200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342 (or 1331 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 21041200 is about 4587.0687808229. The cubic root of 21041200 is about 276.0727246570.

Adding to 21041200 its reverse (214012), we get a palindrome (21255212).

The spelling of 21041200 in words is "twenty-one million, forty-one thousand, two hundred".