21130021330 has 64 divisors (see below), whose sum is σ = 42079357440. Its totient is φ = 7575321600.

The previous prime is 21130021219. The next prime is 21130021337. The reversal of 21130021330 is 3312003112.

It is not an unprimeable number, because it can be changed into a prime (21130021337) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3589990 + ... + 3595870.

It is an arithmetic number, because the mean of its divisors is an integer number (657489960).

Almost surely, 2^21130021330 is an apocalyptic number.

21130021330 is a deficient number, since it is larger than the sum of its proper divisors (20949336110).

21130021330 is a wasteful number, since it uses less digits than its factorization.

21130021330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6355.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21130021330 its reverse (3312003112), we get a palindrome (24442024442).

The spelling of 21130021330 in words is "twenty-one billion, one hundred thirty million, twenty-one thousand, three hundred thirty".