12011222211121 has 16 divisors (see below), whose sum is σ = 14483116431360. Its totient is φ = 9730843759440.

The previous prime is 12011222211103. The next prime is 12011222211199. The reversal of 12011222211121 is 12111222211021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12011222211121 - 2¹⁹ = 12011221686833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12011222211421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104710591 + ... + 104825236.

It is an arithmetic number, because the mean of its divisors is an integer number (905194776960).

Almost surely, 2^{12011222211121} is an apocalyptic number.

It is an amenable number.

12011222211121 is a deficient number, since it is larger than the sum of its proper divisors (2471894220239).

12011222211121 is a wasteful number, since it uses less digits than its factorization.

12011222211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209536284.

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

Adding to 12011222211121 its reverse (12111222211021), we get a palindrome (24122444422142).

The spelling of 12011222211121 in words is "twelve trillion, eleven billion, two hundred twenty-two million, two hundred eleven thousand, one hundred twenty-one".