12012111110121 has 4 divisors (see below), whose sum is σ = 16016148146832. Its totient is φ = 8008074073412.

The previous prime is 12012111110113. The next prime is 12012111110159. The reversal of 12012111110121 is 12101111121021.

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 12012111110121 - 2³ = 12012111110113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12012111110121.

It is not an unprimeable number, because it can be changed into a prime (12012111110821) 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, 2002018518351 + ... + 2002018518356.

It is an arithmetic number, because the mean of its divisors is an integer number (4004037036708).

Almost surely, 2^{12012111110121} is an apocalyptic number.

It is an amenable number.

12012111110121 is a deficient number, since it is larger than the sum of its proper divisors (4004037036711).

12012111110121 is an equidigital number, since it uses as much as digits as its factorization.

12012111110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4004037036710.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 12012111110121 its reverse (12101111121021), we get a palindrome (24113222231142).

The spelling of 12012111110121 in words is "twelve trillion, twelve billion, one hundred eleven million, one hundred ten thousand, one hundred twenty-one".