221220222108 has 12 divisors (see below), whose sum is σ = 516180518280. Its totient is φ = 73740074032.

The previous prime is 221220222101. The next prime is 221220222149. The reversal of 221220222108 is 801222022122.

It is a happy number.

221220222108 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220222101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9217509243 + ... + 9217509266.

It is an arithmetic number, because the mean of its divisors is an integer number (43015043190).

Almost surely, 2^221220222108 is an apocalyptic number.

It is an amenable number.

221220222108 is an abundant number, since it is smaller than the sum of its proper divisors (294960296172).

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

221220222108 is a wasteful number, since it uses less digits than its factorization.

221220222108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18435018516 (or 18435018514 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The spelling of 221220222108 in words is "two hundred twenty-one billion, two hundred twenty million, two hundred twenty-two thousand, one hundred eight".