12001002010121 has 4 divisors (see below), whose sum is σ = 12706943304852. Its totient is φ = 11295060715392.

The previous prime is 12001002010111. The next prime is 12001002010133. The reversal of 12001002010121 is 12101020010021.

12001002010121 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 7785634575625 + 4215367434496 = 2790275^2 + 2053136^2 .

It is a cyclic number.

It is not a de Polignac number, because 12001002010121 - 2¹⁴ = 12001001993737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12001002010111) 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, 352970647340 + ... + 352970647373.

It is an arithmetic number, because the mean of its divisors is an integer number (3176735826213).

Almost surely, 2^{12001002010121} is an apocalyptic number.

It is an amenable number.

12001002010121 is a deficient number, since it is larger than the sum of its proper divisors (705941294731).

12001002010121 is an equidigital number, since it uses as much as digits as its factorization.

12001002010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705941294730.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12001002010121 its reverse (12101020010021), we get a palindrome (24102022020142).

The spelling of 12001002010121 in words is "twelve trillion, one billion, two million, ten thousand, one hundred twenty-one".