221222424032220 has 96 divisors (see below), whose sum is σ = 702179677946880. Its totient is φ = 51588711025920.

The previous prime is 221222424032189. The next prime is 221222424032249. The reversal of 221222424032220 is 22230424222122.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7463629716 + ... + 7463659355.

It is an arithmetic number, because the mean of its divisors is an integer number (7314371645280).

Almost surely, 2^{221222424032220} is an apocalyptic number.

221222424032220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221222424032220 is an abundant number, since it is smaller than the sum of its proper divisors (480957253914660).

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

221222424032220 is a wasteful number, since it uses less digits than its factorization.

221222424032220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14927289115 (or 14927289113 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 30.

Adding to 221222424032220 its reverse (22230424222122), we get a palindrome (243452848254342).

The spelling of 221222424032220 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, four hundred twenty-four million, thirty-two thousand, two hundred twenty".