12111100221221 has 8 divisors (see below), whose sum is σ = 12137056646400. Its totient is φ = 12085168160160.

The previous prime is 12111100221193. The next prime is 12111100221299. The reversal of 12111100221221 is 12212200111121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12111100221221 - 2¹⁴ = 12111100204837 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 12111100221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111100721221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5095616 + ... + 7084313.

It is an arithmetic number, because the mean of its divisors is an integer number (1517132080800).

Almost surely, 2^{12111100221221} is an apocalyptic number.

It is an amenable number.

12111100221221 is a deficient number, since it is larger than the sum of its proper divisors (25956425179).

12111100221221 is a wasteful number, since it uses less digits than its factorization.

12111100221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12182059.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12111100221221 its reverse (12212200111121), we get a palindrome (24323300332342).

The spelling of 12111100221221 in words is "twelve trillion, one hundred eleven billion, one hundred million, two hundred twenty-one thousand, two hundred twenty-one".