21211414 has 24 divisors (see below), whose sum is σ = 37395648. Its totient is φ = 8996400.

The previous prime is 21211403. The next prime is 21211433. The reversal of 21211414 is 41411212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 8827 + ... + 10969.

It is an arithmetic number, because the mean of its divisors is an integer number (1558152).

Almost surely, 2^21211414 is an apocalyptic number.

21211414 is a deficient number, since it is larger than the sum of its proper divisors (16184234).

21211414 is a wasteful number, since it uses less digits than its factorization.

21211414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2260 (or 2253 counting only the distinct ones).

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

The square root of 21211414 is about 4605.5850876952. The cubic root of 21211414 is about 276.8151616513.

Adding to 21211414 its reverse (41411212), we get a palindrome (62622626).

The spelling of 21211414 in words is "twenty-one million, two hundred eleven thousand, four hundred fourteen".