21033103330 has 16 divisors (see below), whose sum is σ = 38055753144. Its totient is φ = 8369648640.

The previous prime is 21033103321. The next prime is 21033103331. The reversal of 21033103330 is 3330133012.

It can be written as a sum of positive squares in 4 ways, for example, as 15300947809 + 5732155521 = 123697^2 + 75711^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21033103298 and 21033103307.

It is not an unprimeable number, because it can be changed into a prime (21033103331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5447061 + ... + 5450920.

Almost surely, 2^21033103330 is an apocalyptic number.

21033103330 is a deficient number, since it is larger than the sum of its proper divisors (17022649814).

21033103330 is a wasteful number, since it uses less digits than its factorization.

21033103330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10898181.

The product of its (nonzero) digits is 486, while the sum is 19.

Adding to 21033103330 its reverse (3330133012), we get a palindrome (24363236342).

The spelling of 21033103330 in words is "twenty-one billion, thirty-three million, one hundred three thousand, three hundred thirty".