21412201 has 4 divisors (see below), whose sum is σ = 21520000. Its totient is φ = 21304404.

The previous prime is 21412189. The next prime is 21412217. The reversal of 21412201 is 10221412.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21412201 - 2¹¹ = 21410153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21412301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53601 + ... + 53998.

It is an arithmetic number, because the mean of its divisors is an integer number (5380000).

Almost surely, 2^21412201 is an apocalyptic number.

It is an amenable number.

21412201 is a deficient number, since it is larger than the sum of its proper divisors (107799).

21412201 is a wasteful number, since it uses less digits than its factorization.

21412201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107798.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 21412201 is about 4627.3319526483. The cubic root of 21412201 is about 277.6858630946.

Adding to 21412201 its reverse (10221412), we get a palindrome (31633613).

The spelling of 21412201 in words is "twenty-one million, four hundred twelve thousand, two hundred one".