12111210201221 has 8 divisors (see below), whose sum is σ = 12173264143488. Its totient is φ = 12049265800000.

The previous prime is 12111210201203. The next prime is 12111210201229. The reversal of 12111210201221 is 12210201211121.

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 12111210201221 - 2⁶ = 12111210201157 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 12111210201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111210201229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27163565 + ... + 27605826.

It is an arithmetic number, because the mean of its divisors is an integer number (1521658017936).

Almost surely, 2^{12111210201221} is an apocalyptic number.

It is an amenable number.

12111210201221 is a deficient number, since it is larger than the sum of its proper divisors (62053942267).

12111210201221 is an equidigital number, since it uses as much as digits as its factorization.

12111210201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54770523.

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

Adding to 12111210201221 its reverse (12210201211121), we get a palindrome (24321411412342).

The spelling of 12111210201221 in words is "twelve trillion, one hundred eleven billion, two hundred ten million, two hundred one thousand, two hundred twenty-one".