21011303110330 has 48 divisors (see below), whose sum is σ = 43266394909080. Its totient is φ = 7301665502208.

The previous prime is 21011303110283. The next prime is 21011303110333. The reversal of 21011303110330 is 3301130311012.

It can be written as a sum of positive squares in 12 ways, for example, as 8170124705649 + 12841178404681 = 2858343^2 + 3583459^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21011303110298 and 21011303110307.

It is not an unprimeable number, because it can be changed into a prime (21011303110333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 279591165 + ... + 279666304.

Almost surely, 2^{21011303110330} is an apocalyptic number.

21011303110330 is an abundant number, since it is smaller than the sum of its proper divisors (22255091798750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21011303110330 is a wasteful number, since it uses less digits than its factorization.

21011303110330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559257523 (or 559257506 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 21011303110330 its reverse (3301130311012), we get a palindrome (24312433421342).

The spelling of 21011303110330 in words is "twenty-one trillion, eleven billion, three hundred three million, one hundred ten thousand, three hundred thirty".