21119229 has 6 divisors (see below), whose sum is σ = 30505566. Its totient is φ = 14079480.

The previous prime is 21119213. The next prime is 21119233. The reversal of 21119229 is 92291112.

It can be written as a sum of positive squares in only one way, i.e., 20115225 + 1004004 = 4485^2 + 1002^2 .

It is not a de Polignac number, because 21119229 - 2⁴ = 21119213 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21119239) 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 in 5 ways as a sum of consecutive naturals, for example, 1173282 + ... + 1173299.

It is an arithmetic number, because the mean of its divisors is an integer number (5084261).

Almost surely, 2^21119229 is an apocalyptic number.

It is an amenable number.

21119229 is a deficient number, since it is larger than the sum of its proper divisors (9386337).

21119229 is a wasteful number, since it uses less digits than its factorization.

21119229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2346587 (or 2346584 counting only the distinct ones).

The product of its digits is 648, while the sum is 27.

The square root of 21119229 is about 4595.5662327944. The cubic root of 21119229 is about 276.4135655634.

The spelling of 21119229 in words is "twenty-one million, one hundred nineteen thousand, two hundred twenty-nine".