21130033330 has 24 divisors (see below), whose sum is σ = 44243703468. Its totient is φ = 7244582688.

The previous prime is 21130033321. The next prime is 21130033357. The reversal of 21130033330 is 3333003112.

It can be written as a sum of positive squares in 2 ways, for example, as 20266084881 + 863948449 = 142359^2 + 29393^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21130033298 and 21130033307.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 21560769 + ... + 21561748.

Almost surely, 2^21130033330 is an apocalyptic number.

21130033330 is an abundant number, since it is smaller than the sum of its proper divisors (23113670138).

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

21130033330 is a wasteful number, since it uses less digits than its factorization.

21130033330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43122538 (or 43122531 counting only the distinct ones).

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

Adding to 21130033330 its reverse (3333003112), we get a palindrome (24463036442).

The spelling of 21130033330 in words is "twenty-one billion, one hundred thirty million, thirty-three thousand, three hundred thirty".