221210021222220 has 24 divisors (see below), whose sum is σ = 619388059422384. Its totient is φ = 58989338992576.

The previous prime is 221210021222209. The next prime is 221210021222227. The reversal of 221210021222220 is 22222120012122.

It is not an unprimeable number, because it can be changed into a prime (221210021222227) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1843416843459 + ... + 1843416843578.

It is an arithmetic number, because the mean of its divisors is an integer number (25807835809266).

Almost surely, 2^{221210021222220} is an apocalyptic number.

221210021222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221210021222220 is an abundant number, since it is smaller than the sum of its proper divisors (398178038200164).

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

221210021222220 is a wasteful number, since it uses less digits than its factorization.

221210021222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3686833687049 (or 3686833687047 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 221210021222220 its reverse (22222120012122), we get a palindrome (243432141234342).

The spelling of 221210021222220 in words is "two hundred twenty-one trillion, two hundred ten billion, twenty-one million, two hundred twenty-two thousand, two hundred twenty".