21211030330 has 96 divisors (see below), whose sum is σ = 47597798016. Its totient is φ = 6768026496.

The previous prime is 21211030327. The next prime is 21211030369. The reversal of 21211030330 is 3303011212.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 391557 + ... + 442423.

It is an arithmetic number, because the mean of its divisors is an integer number (495810396).

Almost surely, 2^21211030330 is an apocalyptic number.

21211030330 is an abundant number, since it is smaller than the sum of its proper divisors (26386767686).

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

21211030330 is a wasteful number, since it uses less digits than its factorization.

21211030330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50948 (or 50941 counting only the distinct ones).

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

Adding to 21211030330 its reverse (3303011212), we get a palindrome (24514041542).

The spelling of 21211030330 in words is "twenty-one billion, two hundred eleven million, thirty thousand, three hundred thirty".