12110221312221 has 4 divisors (see below), whose sum is σ = 16146961749632. Its totient is φ = 8073480874812.

The previous prime is 12110221312207. The next prime is 12110221312229. The reversal of 12110221312221 is 12221312201121.

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 not a de Polignac number, because 12110221312221 - 2²⁷ = 12110087094493 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 (12110221312229) 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, 2018370218701 + ... + 2018370218706.

It is an arithmetic number, because the mean of its divisors is an integer number (4036740437408).

Almost surely, 2^{12110221312221} is an apocalyptic number.

It is an amenable number.

12110221312221 is a deficient number, since it is larger than the sum of its proper divisors (4036740437411).

12110221312221 is an equidigital number, since it uses as much as digits as its factorization.

12110221312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4036740437410.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 12110221312221 its reverse (12221312201121), we get a palindrome (24331533513342).

The spelling of 12110221312221 in words is "twelve trillion, one hundred ten billion, two hundred twenty-one million, three hundred twelve thousand, two hundred twenty-one".