21220030330 has 16 divisors (see below), whose sum is σ = 38389946760. Its totient is φ = 8444924992.

The previous prime is 21220030301. The next prime is 21220030393. The reversal of 21220030330 is 3303002212.

It can be written as a sum of positive squares in 4 ways, for example, as 21164721361 + 55308969 = 145481^2 + 7437^2 .

It is a super-2 number, since 2×21220030330² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5383825 + ... + 5387764.

Almost surely, 2^21220030330 is an apocalyptic number.

21220030330 is a deficient number, since it is larger than the sum of its proper divisors (17169916430).

21220030330 is a wasteful number, since it uses less digits than its factorization.

21220030330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10771793.

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 21220030330 its reverse (3303002212), we get a palindrome (24523032542).

The spelling of 21220030330 in words is "twenty-one billion, two hundred twenty million, thirty thousand, three hundred thirty".