12203211221 has 16 divisors (see below), whose sum is σ = 12507416064. Its totient is φ = 11903111424.

The previous prime is 12203211193. The next prime is 12203211253. The reversal of 12203211221 is 12211230221.

It is not a de Polignac number, because 12203211221 - 2⁶ = 12203211157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12203211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12203231221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6693116 + ... + 6694938.

It is an arithmetic number, because the mean of its divisors is an integer number (781713504).

Almost surely, 2^12203211221 is an apocalyptic number.

It is an amenable number.

12203211221 is a deficient number, since it is larger than the sum of its proper divisors (304204843).

12203211221 is a wasteful number, since it uses less digits than its factorization.

12203211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2860.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12203211221 its reverse (12211230221), we get a palindrome (24414441442).

The spelling of 12203211221 in words is "twelve billion, two hundred three million, two hundred eleven thousand, two hundred twenty-one".