12203222121222 has 96 divisors (see below), whose sum is σ = 28489269515616. Its totient is φ = 3470091018240.

The previous prime is 12203222121217. The next prime is 12203222121313. The reversal of 12203222121222 is 22212122230221.

It is a junction number, because it is equal to n+sod(n) for n = 12203222121192 and 12203222121201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2692258 + ... + 5626250.

It is an arithmetic number, because the mean of its divisors is an integer number (296763224121).

Almost surely, 2^{12203222121222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12203222121222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14244634757808).

12203222121222 is an abundant number, since it is smaller than the sum of its proper divisors (16286047394394).

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

12203222121222 is a wasteful number, since it uses less digits than its factorization.

12203222121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2934374 (or 2934363 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 12203222121222 its reverse (22212122230221), we get a palindrome (34415344351443).

The spelling of 12203222121222 in words is "twelve trillion, two hundred three billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty-two".