21212300330 has 48 divisors (see below), whose sum is σ = 42306818400. Its totient is φ = 7650062784.

The previous prime is 21212300327. The next prime is 21212300363. The reversal of 21212300330 is 3300321212.

It is a junction number, because it is equal to n+sod(n) for n = 21212300299 and 21212300308.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73280 + ... + 218619.

It is an arithmetic number, because the mean of its divisors is an integer number (881392050).

Almost surely, 2^21212300330 is an apocalyptic number.

21212300330 is a deficient number, since it is larger than the sum of its proper divisors (21094518070).

21212300330 is a wasteful number, since it uses less digits than its factorization.

21212300330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291975 (or 291962 counting only the distinct ones).

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

Adding to 21212300330 its reverse (3300321212), we get a palindrome (24512621542).

The spelling of 21212300330 in words is "twenty-one billion, two hundred twelve million, three hundred thousand, three hundred thirty".