21220232230 has 16 divisors (see below), whose sum is σ = 39228754320. Its totient is φ = 8258684832.

The previous prime is 21220232221. The next prime is 21220232279. The reversal of 21220232230 is 3223202212.

It is a junction number, because it is equal to n+sod(n) for n = 21220232198 and 21220232207.

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, 28675620 + ... + 28676359.

It is an arithmetic number, because the mean of its divisors is an integer number (2451797145).

Almost surely, 2^21220232230 is an apocalyptic number.

21220232230 is a deficient number, since it is larger than the sum of its proper divisors (18008522090).

21220232230 is a wasteful number, since it uses less digits than its factorization.

21220232230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57352023.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21220232230 its reverse (3223202212), we get a palindrome (24443434442).

The spelling of 21220232230 in words is "twenty-one billion, two hundred twenty million, two hundred thirty-two thousand, two hundred thirty".