21114671 has 2 divisors, whose sum is σ = 21114672. Its totient is φ = 21114670.

The previous prime is 21114659. The next prime is 21114673. The reversal of 21114671 is 17641112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21114671 - 2⁶ = 21114607 is a prime.

Together with 21114673, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21114673) 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 as a sum of consecutive naturals, namely, 10557335 + 10557336.

It is an arithmetic number, because the mean of its divisors is an integer number (10557336).

Almost surely, 2^21114671 is an apocalyptic number.

21114671 is a deficient number, since it is larger than the sum of its proper divisors (1).

21114671 is an equidigital number, since it uses as much as digits as its factorization.

21114671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 23.

The square root of 21114671 is about 4595.0702932599. The cubic root of 21114671 is about 276.3936787313.

Adding to 21114671 its reverse (17641112), we get a palindrome (38755783).

The spelling of 21114671 in words is "twenty-one million, one hundred fourteen thousand, six hundred seventy-one".