21119039 has 2 divisors, whose sum is σ = 21119040. Its totient is φ = 21119038.

The previous prime is 21119023. The next prime is 21119053. The reversal of 21119039 is 93091112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21119039 - 2⁴ = 21119023 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 21118999 and 21119017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21119239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10559519 + 10559520.

It is an arithmetic number, because the mean of its divisors is an integer number (10559520).

Almost surely, 2^21119039 is an apocalyptic number.

21119039 is a deficient number, since it is larger than the sum of its proper divisors (1).

21119039 is an equidigital number, since it uses as much as digits as its factorization.

21119039 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 21119039 is about 4595.5455606489. The cubic root of 21119039 is about 276.4127366389.

The spelling of 21119039 in words is "twenty-one million, one hundred nineteen thousand, thirty-nine".