21334311 has 12 divisors (see below), whose sum is σ = 31649592. Its totient is φ = 13838256.

The previous prime is 21334253. The next prime is 21334319. The reversal of 21334311 is 11343312.

21334311 is a `hidden beast` number, since 21 + 334 + 311 = 666.

It is not a de Polignac number, because 21334311 - 2¹³ = 21326119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21334319) 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 11 ways as a sum of consecutive naturals, for example, 31701 + ... + 32366.

It is an arithmetic number, because the mean of its divisors is an integer number (2637466).

Almost surely, 2^21334311 is an apocalyptic number.

21334311 is a deficient number, since it is larger than the sum of its proper divisors (10315281).

21334311 is a wasteful number, since it uses less digits than its factorization.

21334311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64110 (or 64107 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 21334311 is about 4618.9079878257. The cubic root of 21334311 is about 277.3487464018.

Adding to 21334311 its reverse (11343312), we get a palindrome (32677623).

Subtracting from 21334311 its reverse (11343312), we obtain a palindrome (9990999).

The spelling of 21334311 in words is "twenty-one million, three hundred thirty-four thousand, three hundred eleven".