21024201 has 8 divisors (see below), whose sum is σ = 30580704. Its totient is φ = 12741920.

The previous prime is 21024197. The next prime is 21024209. The reversal of 21024201 is 10242012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21024201 - 2² = 21024197 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21024209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318516 + ... + 318581.

It is an arithmetic number, because the mean of its divisors is an integer number (3822588).

Almost surely, 2^21024201 is an apocalyptic number.

It is an amenable number.

21024201 is a deficient number, since it is larger than the sum of its proper divisors (9556503).

21024201 is a wasteful number, since it uses less digits than its factorization.

21024201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637111.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 21024201 is about 4585.2154802146. The cubic root of 21024201 is about 275.9983590535.

Adding to 21024201 its reverse (10242012), we get a palindrome (31266213).

It can be divided in two parts, 2 and 1024201, that multiplied together give a palindrome (2048402).

The spelling of 21024201 in words is "twenty-one million, twenty-four thousand, two hundred one".