21144119 has 2 divisors, whose sum is σ = 21144120. Its totient is φ = 21144118.

The previous prime is 21144083. The next prime is 21144121. The reversal of 21144119 is 91144112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21144119 is a prime.

It is a super-2 number, since 2×21144119² = 894147536572322, which contains 22 as substring.

Together with 21144121, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 21144094 and 21144103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21144419) 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 as a sum of consecutive naturals, namely, 10572059 + 10572060.

It is an arithmetic number, because the mean of its divisors is an integer number (10572060).

Almost surely, 2^21144119 is an apocalyptic number.

21144119 is a deficient number, since it is larger than the sum of its proper divisors (1).

21144119 is an equidigital number, since it uses as much as digits as its factorization.

21144119 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 23.

The square root of 21144119 is about 4598.2734803402. The cubic root of 21144119 is about 276.5221117077.

The spelling of 21144119 in words is "twenty-one million, one hundred forty-four thousand, one hundred nineteen".