21119369 has 2 divisors, whose sum is σ = 21119370. Its totient is φ = 21119368.

The previous prime is 21119363. The next prime is 21119377. The reversal of 21119369 is 96391112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13053769 + 8065600 = 3613^2 + 2840^2 .

It is a cyclic number.

It is not a de Polignac number, because 21119369 - 2⁸ = 21119113 is a prime.

It is a super-2 number, since 2×21119369² = 892055493916322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21119363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10559684 + 10559685.

It is an arithmetic number, because the mean of its divisors is an integer number (10559685).

Almost surely, 2^21119369 is an apocalyptic number.

It is an amenable number.

21119369 is a deficient number, since it is larger than the sum of its proper divisors (1).

21119369 is an equidigital number, since it uses as much as digits as its factorization.

21119369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 32.

The square root of 21119369 is about 4595.5814648421. The cubic root of 21119369 is about 276.4141763466.

The spelling of 21119369 in words is "twenty-one million, one hundred nineteen thousand, three hundred sixty-nine".