221200222220 has 24 divisors (see below), whose sum is σ = 464529912000. Its totient is φ = 88478289792.

The previous prime is 221200222207. The next prime is 221200222223. The reversal of 221200222220 is 22222002122.

It is not an unprimeable number, because it can be changed into a prime (221200222223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1376861 + ... + 1529099.

It is an arithmetic number, because the mean of its divisors is an integer number (19355413000).

Almost surely, 2^221200222220 is an apocalyptic number.

221200222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221200222220 is an abundant number, since it is smaller than the sum of its proper divisors (243329689780).

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

221200222220 is a wasteful number, since it uses less digits than its factorization.

221200222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224897 (or 224895 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 221200222220 its reverse (22222002122), we get a palindrome (243422224342).

The spelling of 221200222220 in words is "two hundred twenty-one billion, two hundred million, two hundred twenty-two thousand, two hundred twenty".