21220313230 has 16 divisors (see below), whose sum is σ = 38279070144. Its totient is φ = 8469790560.

The previous prime is 21220313209. The next prime is 21220313321. The reversal of 21220313230 is 3231302212.

It is a junction number, because it is equal to n+sod(n) for n = 21220313198 and 21220313207.

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, 2286981 + ... + 2296240.

It is an arithmetic number, because the mean of its divisors is an integer number (2392441884).

Almost surely, 2^21220313230 is an apocalyptic number.

21220313230 is a deficient number, since it is larger than the sum of its proper divisors (17058756914).

21220313230 is a wasteful number, since it uses less digits than its factorization.

21220313230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4583691.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21220313230 its reverse (3231302212), we get a palindrome (24451615442).

The spelling of 21220313230 in words is "twenty-one billion, two hundred twenty million, three hundred thirteen thousand, two hundred thirty".