12001231212109 has 8 divisors (see below), whose sum is σ = 12014906436792. Its totient is φ = 11987558257920.

The previous prime is 12001231212053. The next prime is 12001231212119. The reversal of 12001231212109 is 90121213210021.

12001231212109 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 4 ways, for example, as 1935980046025 + 10065251166084 = 1391395^2 + 3172578^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12001231212109 - 2³¹ = 11999083728461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001231212119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10124449 + ... + 11247529.

It is an arithmetic number, because the mean of its divisors is an integer number (1501863304599).

Almost surely, 2^{12001231212109} is an apocalyptic number.

It is an amenable number.

12001231212109 is a deficient number, since it is larger than the sum of its proper divisors (13675224683).

12001231212109 is a wasteful number, since it uses less digits than its factorization.

12001231212109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135247.

The product of its (nonzero) digits is 432, while the sum is 25.

The spelling of 12001231212109 in words is "twelve trillion, one billion, two hundred thirty-one million, two hundred twelve thousand, one hundred nine".