21039119 has 2 divisors, whose sum is σ = 21039120. Its totient is φ = 21039118.

The previous prime is 21039107. The next prime is 21039133. The reversal of 21039119 is 91193012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21039119 - 2⁴ = 21039103 is a prime.

It is a super-2 number, since 2×21039119² = 885289056592322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21039719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10519559 + 10519560.

It is an arithmetic number, because the mean of its divisors is an integer number (10519560).

Almost surely, 2^21039119 is an apocalyptic number.

21039119 is a deficient number, since it is larger than the sum of its proper divisors (1).

21039119 is an equidigital number, since it uses as much as digits as its factorization.

21039119 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 21039119 is about 4586.8419419029. The cubic root of 21039119 is about 276.0636230488.

The spelling of 21039119 in words is "twenty-one million, thirty-nine thousand, one hundred nineteen".