12203222121221 has 16 divisors (see below), whose sum is σ = 12709208160768. Its totient is φ = 11704271040000.

The previous prime is 12203222121217. The next prime is 12203222121313. The reversal of 12203222121221 is 12212122230221.

It is a cyclic number.

It is not a de Polignac number, because 12203222121221 - 2² = 12203222121217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12203222121521) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 55612721 + ... + 55831721.

It is an arithmetic number, because the mean of its divisors is an integer number (794325510048).

Almost surely, 2^{12203222121221} is an apocalyptic number.

It is an amenable number.

12203222121221 is a deficient number, since it is larger than the sum of its proper divisors (505986039547).

12203222121221 is a wasteful number, since it uses less digits than its factorization.

12203222121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235052.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 12203222121221 its reverse (12212122230221), we get a palindrome (24415344351442).

The spelling of 12203222121221 in words is "twelve trillion, two hundred three billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty-one".