12221222202222 has 96 divisors (see below), whose sum is σ = 27475955619840. Its totient is φ = 3620317272000.

The previous prime is 12221222202017. The next prime is 12221222202251. The reversal of 12221222202222 is 22220222212221.

It is a junction number, because it is equal to n+sod(n) for n = 12221222202192 and 12221222202201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4737883 + ... + 6847625.

It is an arithmetic number, because the mean of its divisors is an integer number (286207871040).

Almost surely, 2^{12221222202222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12221222202222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13737977809920).

12221222202222 is an abundant number, since it is smaller than the sum of its proper divisors (15254733417618).

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

12221222202222 is a wasteful number, since it uses less digits than its factorization.

12221222202222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2109950 (or 2109939 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 12221222202222 its reverse (22220222212221), we get a palindrome (34441444414443).

Subtracting 12221222202222 from its reverse (22220222212221), we obtain a palindrome (9999000009999).

The spelling of 12221222202222 in words is "twelve trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred two thousand, two hundred twenty-two".