12201100212221 has 4 divisors (see below), whose sum is σ = 12231526896444. Its totient is φ = 12170673528000.

The previous prime is 12201100212199. The next prime is 12201100212253. The reversal of 12201100212221 is 12221200110221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9097830420121 + 3103269792100 = 3016261^2 + 1761610^2 .

It is a cyclic number.

It is not a de Polignac number, because 12201100212221 - 2¹⁸ = 12201099950077 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 12201100212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201100214221) 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, 15213341510 + ... + 15213342311.

It is an arithmetic number, because the mean of its divisors is an integer number (3057881724111).

Almost surely, 2^{12201100212221} is an apocalyptic number.

It is an amenable number.

12201100212221 is a deficient number, since it is larger than the sum of its proper divisors (30426684223).

12201100212221 is an equidigital number, since it uses as much as digits as its factorization.

12201100212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30426684222.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12201100212221 its reverse (12221200110221), we get a palindrome (24422300322442).

The spelling of 12201100212221 in words is "twelve trillion, two hundred one billion, one hundred million, two hundred twelve thousand, two hundred twenty-one".