12111222201121 has 4 divisors (see below), whose sum is σ = 12111236436244. Its totient is φ = 12111207966000.

The previous prime is 12111222201079. The next prime is 12111222201179. The reversal of 12111222201121 is 12110222211121.

It is a happy number.

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 7309799024896 + 4801423176225 = 2703664^2 + 2191215^2 .

It is a cyclic number.

It is not a de Polignac number, because 12111222201121 - 2¹³ = 12111222192929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111229201121) 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, 5754330 + ... + 7571971.

It is an arithmetic number, because the mean of its divisors is an integer number (3027809109061).

Almost surely, 2^{12111222201121} is an apocalyptic number.

It is an amenable number.

12111222201121 is a deficient number, since it is larger than the sum of its proper divisors (14235123).

12111222201121 is an equidigital number, since it uses as much as digits as its factorization.

12111222201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14235122.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12111222201121 its reverse (12110222211121), we get a palindrome (24221444412242).

The spelling of 12111222201121 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-two million, two hundred one thousand, one hundred twenty-one".