12012211020121 has 16 divisors (see below), whose sum is σ = 13010659618320. Its totient is φ = 11024423516160.

The previous prime is 12012211020011. The next prime is 12012211020137. The reversal of 12012211020121 is 12102011221021.

12012211020121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 6787379667600 + 5224831352521 = 2605260^2 + 2285789^2 .

It is a cyclic number.

It is not a de Polignac number, because 12012211020121 - 2¹³ = 12012211011929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12012211020095 and 12012211020104.

It is not an unprimeable number, because it can be changed into a prime (12012211020181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9795441 + ... + 10953313.

It is an arithmetic number, because the mean of its divisors is an integer number (813166226145).

Almost surely, 2^{12012211020121} is an apocalyptic number.

It is an amenable number.

12012211020121 is a deficient number, since it is larger than the sum of its proper divisors (998448598199).

12012211020121 is a wasteful number, since it uses less digits than its factorization.

12012211020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162476.

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

Adding to 12012211020121 its reverse (12102011221021), we get a palindrome (24114222241142).

The spelling of 12012211020121 in words is "twelve trillion, twelve billion, two hundred eleven million, twenty thousand, one hundred twenty-one".