21321123211330 has 64 divisors (see below), whose sum is σ = 40134778905600. Its totient is φ = 8148347311104.

The previous prime is 21321123211313. The next prime is 21321123211361. The reversal of 21321123211330 is 3311232112312.

It is a junction number, because it is equal to n+sod(n) for n = 21321123211295 and 21321123211304.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2806522 + ... + 7107658.

It is an arithmetic number, because the mean of its divisors is an integer number (627105920400).

Almost surely, 2^{21321123211330} is an apocalyptic number.

21321123211330 is a deficient number, since it is larger than the sum of its proper divisors (18813655694270).

21321123211330 is a wasteful number, since it uses less digits than its factorization.

21321123211330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4301443.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21321123211330 its reverse (3311232112312), we get a palindrome (24632355323642).

The spelling of 21321123211330 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred twenty-three million, two hundred eleven thousand, three hundred thirty".