21021222112230 has 128 divisors (see below), whose sum is σ = 56482301030400. Its totient is φ = 4975820734464.

The previous prime is 21021222112183. The next prime is 21021222112301. The reversal of 21021222112230 is 3221122212012.

It is a super-3 number, since 3×21021222112230³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21021222112197 and 21021222112206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2703195 + ... + 7024934.

It is an arithmetic number, because the mean of its divisors is an integer number (441267976800).

Almost surely, 2^{21021222112230} is an apocalyptic number.

21021222112230 is an abundant number, since it is smaller than the sum of its proper divisors (35461078918170).

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

21021222112230 is a wasteful number, since it uses less digits than its factorization.

21021222112230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9728398.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21021222112230 its reverse (3221122212012), we get a palindrome (24242344324242).

The spelling of 21021222112230 in words is "twenty-one trillion, twenty-one billion, two hundred twenty-two million, one hundred twelve thousand, two hundred thirty".