21212430230 has 8 divisors (see below), whose sum is σ = 38182374432. Its totient is φ = 8484972088.

The previous prime is 21212430229. The next prime is 21212430251. The reversal of 21212430230 is 3203421212.

21212430230 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060621502 + ... + 1060621521.

It is an arithmetic number, because the mean of its divisors is an integer number (4772796804).

Almost surely, 2^21212430230 is an apocalyptic number.

21212430230 is a deficient number, since it is larger than the sum of its proper divisors (16969944202).

21212430230 is a wasteful number, since it uses less digits than its factorization.

21212430230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121243030.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21212430230 its reverse (3203421212), we get a palindrome (24415851442).

The spelling of 21212430230 in words is "twenty-one billion, two hundred twelve million, four hundred thirty thousand, two hundred thirty".