12221022200221 has 4 divisors (see below), whose sum is σ = 12260830090432. Its totient is φ = 12181214310012.

The previous prime is 12221022200129. The next prime is 12221022200267. The reversal of 12221022200221 is 12200222012221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12221022200221 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 (12221022260221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19903944645 + ... + 19903945258.

It is an arithmetic number, because the mean of its divisors is an integer number (3065207522608).

Almost surely, 2^{12221022200221} is an apocalyptic number.

It is an amenable number.

12221022200221 is a deficient number, since it is larger than the sum of its proper divisors (39807890211).

12221022200221 is an equidigital number, since it uses as much as digits as its factorization.

12221022200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39807890210.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 12221022200221 its reverse (12200222012221), we get a palindrome (24421244212442).

The spelling of 12221022200221 in words is "twelve trillion, two hundred twenty-one billion, twenty-two million, two hundred thousand, two hundred twenty-one".