21071119 has 2 divisors, whose sum is σ = 21071120. Its totient is φ = 21071118.

The previous prime is 21071111. The next prime is 21071123. The reversal of 21071119 is 91117012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21071119 - 2³ = 21071111 is a prime.

It is a super-2 number, since 2×21071119² = 887984111824322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21071119.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21071111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10535559 + 10535560.

It is an arithmetic number, because the mean of its divisors is an integer number (10535560).

Almost surely, 2^21071119 is an apocalyptic number.

21071119 is a deficient number, since it is larger than the sum of its proper divisors (1).

21071119 is an equidigital number, since it uses as much as digits as its factorization.

21071119 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 22.

The square root of 21071119 is about 4590.3288553218. The cubic root of 21071119 is about 276.2035142190.

The spelling of 21071119 in words is "twenty-one million, seventy-one thousand, one hundred nineteen".