21213321230 has 16 divisors (see below), whose sum is σ = 38185834320. Its totient is φ = 8484916032.

The previous prime is 21213321211. The next prime is 21213321247. The reversal of 21213321230 is 3212331212.

It is a congruent number.

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, 246506 + ... + 321234.

It is an arithmetic number, because the mean of its divisors is an integer number (2386614645).

Almost surely, 2^21213321230 is an apocalyptic number.

21213321230 is a deficient number, since it is larger than the sum of its proper divisors (16972513090).

21213321230 is a wasteful number, since it uses less digits than its factorization.

21213321230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103123.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21213321230 its reverse (3212331212), we get a palindrome (24425652442).

The spelling of 21213321230 in words is "twenty-one billion, two hundred thirteen million, three hundred twenty-one thousand, two hundred thirty".