21220224230 has 32 divisors (see below), whose sum is σ = 39904799040. Its totient is φ = 8114243200.

The previous prime is 21220224199. The next prime is 21220224239. The reversal of 21220224230 is 3242202212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220224239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 332954 + ... + 391533.

It is an arithmetic number, because the mean of its divisors is an integer number (1247024970).

Almost surely, 2^21220224230 is an apocalyptic number.

21220224230 is a deficient number, since it is larger than the sum of its proper divisors (18684574810).

21220224230 is a wasteful number, since it uses less digits than its factorization.

21220224230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724624.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21220224230 its reverse (3242202212), we get a palindrome (24462426442).

The spelling of 21220224230 in words is "twenty-one billion, two hundred twenty million, two hundred twenty-four thousand, two hundred thirty".