21030221330 has 16 divisors (see below), whose sum is σ = 38065878720. Its totient is φ = 8365092912.

The previous prime is 21030221309. The next prime is 21030221341. The reversal of 21030221330 is 3312203012.

It is a junction number, because it is equal to n+sod(n) for n = 21030221299 and 21030221308.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5872574 + ... + 5876153.

It is an arithmetic number, because the mean of its divisors is an integer number (2379117420).

Almost surely, 2^21030221330 is an apocalyptic number.

21030221330 is a deficient number, since it is larger than the sum of its proper divisors (17035657390).

21030221330 is a wasteful number, since it uses less digits than its factorization.

21030221330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11748913.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21030221330 its reverse (3312203012), we get a palindrome (24342424342).

The spelling of 21030221330 in words is "twenty-one billion, thirty million, two hundred twenty-one thousand, three hundred thirty".