12120002121121 has 4 divisors (see below), whose sum is σ = 12120821221012. Its totient is φ = 12119183021232.

The previous prime is 12120002121083. The next prime is 12120002121137. The reversal of 12120002121121 is 12112120002121.

12120002121121 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.

It can be written as a sum of positive squares in 2 ways, for example, as 5613753080896 + 6506249040225 = 2369336^2 + 2550735^2 .

It is a cyclic number.

It is not a de Polignac number, because 12120002121121 - 2³³ = 12111412186529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12120002121095 and 12120002121104.

It is not an unprimeable number, because it can be changed into a prime (12120002161121) 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, 409527750 + ... + 409557343.

It is an arithmetic number, because the mean of its divisors is an integer number (3030205305253).

Almost surely, 2^{12120002121121} is an apocalyptic number.

It is an amenable number.

12120002121121 is a deficient number, since it is larger than the sum of its proper divisors (819099891).

12120002121121 is an equidigital number, since it uses as much as digits as its factorization.

12120002121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819099890.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12120002121121 its reverse (12112120002121), we get a palindrome (24232122123242).

It can be divided in two parts, 12120002121 and 121, that multiplied together give a palindrome (1466520256641).

The spelling of 12120002121121 in words is "twelve trillion, one hundred twenty billion, two million, one hundred twenty-one thousand, one hundred twenty-one".