12221011111121 has 4 divisors (see below), whose sum is σ = 12224503830000. Its totient is φ = 12217518392244.

The previous prime is 12221011111031. The next prime is 12221011111123. The reversal of 12221011111121 is 12111111012221.

12221011111121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 12221011111121 - 2¹⁰ = 12221011110097 is a prime.

It is a super-2 number, since 2×12221011111121² (a number of 27 digits) contains 22 as substring.

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 12221011111121.

It is not an unprimeable number, because it can be changed into a prime (12221011111123) 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, 1746354191 + ... + 1746361188.

It is an arithmetic number, because the mean of its divisors is an integer number (3056125957500).

Almost surely, 2^{12221011111121} is an apocalyptic number.

It is an amenable number.

12221011111121 is a deficient number, since it is larger than the sum of its proper divisors (3492718879).

12221011111121 is an equidigital number, since it uses as much as digits as its factorization.

12221011111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3492718878.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 12221011111121 its reverse (12111111012221), we get a palindrome (24332122123342).

The spelling of 12221011111121 in words is "twelve trillion, two hundred twenty-one billion, eleven million, one hundred eleven thousand, one hundred twenty-one".