21332201 has 8 divisors (see below), whose sum is σ = 24283584. Its totient is φ = 18549520.

The previous prime is 21332189. The next prime is 21332209. The reversal of 21332201 is 10223312.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-21332201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21332209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41906 + ... + 42411.

It is an arithmetic number, because the mean of its divisors is an integer number (3035448).

Almost surely, 2^21332201 is an apocalyptic number.

It is an amenable number.

21332201 is a deficient number, since it is larger than the sum of its proper divisors (2951383).

21332201 is a wasteful number, since it uses less digits than its factorization.

21332201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84351.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 21332201 is about 4618.6795732114. The cubic root of 21332201 is about 277.3396026779.

Adding to 21332201 its reverse (10223312), we get a palindrome (31555513).

Subtracting from 21332201 its reverse (10223312), we obtain a square (11108889 = 3333²).

It can be divided in two parts, 2133 and 2201, that added together give a palindrome (4334).

The spelling of 21332201 in words is "twenty-one million, three hundred thirty-two thousand, two hundred one".