21414211 has 16 divisors (see below), whose sum is σ = 27209728. Its totient is φ = 16394400.

The previous prime is 21414193. The next prime is 21414221. The reversal of 21414211 is 11241412.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21414211 - 2¹⁷ = 21283139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21414221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 975 + ... + 6616.

It is an arithmetic number, because the mean of its divisors is an integer number (1700608).

Almost surely, 2^21414211 is an apocalyptic number.

21414211 is a deficient number, since it is larger than the sum of its proper divisors (5795517).

21414211 is a wasteful number, since it uses less digits than its factorization.

21414211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7642.

The product of its digits is 64, while the sum is 16.

The square root of 21414211 is about 4627.5491353415. The cubic root of 21414211 is about 277.6945517720.

Adding to 21414211 its reverse (11241412), we get a palindrome (32655623).

The spelling of 21414211 in words is "twenty-one million, four hundred fourteen thousand, two hundred eleven".