12012010001 has 4 divisors (see below), whose sum is σ = 12018771492. Its totient is φ = 12005248512.

The previous prime is 12012009959. The next prime is 12012010013. The reversal of 12012010001 is 10001021021.

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 8386163776 + 3625846225 = 91576^2 + 60215^2 .

It is a cyclic number.

It is not a de Polignac number, because 12012010001 - 2²² = 12007815697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12012010051) 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, 3378080 + ... + 3381633.

It is an arithmetic number, because the mean of its divisors is an integer number (3004692873).

Almost surely, 2^12012010001 is an apocalyptic number.

It is an amenable number.

12012010001 is a deficient number, since it is larger than the sum of its proper divisors (6761491).

12012010001 is an equidigital number, since it uses as much as digits as its factorization.

12012010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6761490.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 12012010001 its reverse (10001021021), we get a palindrome (22013031022).

The spelling of 12012010001 in words is "twelve billion, twelve million, ten thousand, one".