12220001022222 has 192 divisors, whose sum is σ = 32901570723840. Its totient is φ = 3198783182400.

The previous prime is 12220001022217. The next prime is 12220001022259. The reversal of 12220001022222 is 22222010002221.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12220001022195 and 12220001022204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 110003847 + ... + 110114877.

It is an arithmetic number, because the mean of its divisors is an integer number (171362347520).

Almost surely, 2^{12220001022222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12220001022222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16450785361920).

12220001022222 is an abundant number, since it is smaller than the sum of its proper divisors (20681569701618).

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

12220001022222 is a wasteful number, since it uses less digits than its factorization.

12220001022222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112579 (or 112576 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 12220001022222 its reverse (22222010002221), we get a palindrome (34442011024443).

The spelling of 12220001022222 in words is "twelve trillion, two hundred twenty billion, one million, twenty-two thousand, two hundred twenty-two".