221222120210 has 128 divisors (see below), whose sum is σ = 508559192064. Its totient is φ = 67420926720.

The previous prime is 221222120179. The next prime is 221222120213. The reversal of 221222120210 is 12021222122.

It is a happy number.

221222120210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221222120213) 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 63 ways as a sum of consecutive naturals, for example, 2738417 + ... + 2818043.

It is an arithmetic number, because the mean of its divisors is an integer number (3973118688).

Almost surely, 2^221222120210 is an apocalyptic number.

221222120210 is an abundant number, since it is smaller than the sum of its proper divisors (287337071854).

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

221222120210 is a wasteful number, since it uses less digits than its factorization.

221222120210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79768.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221222120210 its reverse (12021222122), we get a palindrome (233243342332).

The spelling of 221222120210 in words is "two hundred twenty-one billion, two hundred twenty-two million, one hundred twenty thousand, two hundred ten".