21223220302230 has 128 divisors (see below), whose sum is σ = 52441694137728. Its totient is φ = 5494460055552.

The previous prime is 21223220302187. The next prime is 21223220302243. The reversal of 21223220302230 is 3220302232212.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21223220302230.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1143914634 + ... + 1143933186.

It is an arithmetic number, because the mean of its divisors is an integer number (409700735451).

Almost surely, 2^{21223220302230} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21223220302230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26220847068864).

21223220302230 is an abundant number, since it is smaller than the sum of its proper divisors (31218473835498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21223220302230 is a wasteful number, since it uses less digits than its factorization.

21223220302230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26130.

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 21223220302230 its reverse (3220302232212), we get a palindrome (24443522534442).

The spelling of 21223220302230 in words is "twenty-one trillion, two hundred twenty-three billion, two hundred twenty million, three hundred two thousand, two hundred thirty".