12001001978201 has 8 divisors (see below), whose sum is σ = 12392748428544. Its totient is φ = 11609544112560.

The previous prime is 12001001978183. The next prime is 12001001978213. The reversal of 12001001978201 is 10287910010021.

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 12001001978201 - 2¹⁸ = 12001001716057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12001001978291) 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, 72061646 + ... + 72227991.

It is an arithmetic number, because the mean of its divisors is an integer number (1549093553568).

Almost surely, 2^{12001001978201} is an apocalyptic number.

It is an amenable number.

12001001978201 is a deficient number, since it is larger than the sum of its proper divisors (391746450343).

12001001978201 is a wasteful number, since it uses less digits than its factorization.

12001001978201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144292351.

The product of its (nonzero) digits is 2016, while the sum is 32.

Adding to 12001001978201 its reverse (10287910010021), we get a palindrome (22288911988222).

The spelling of 12001001978201 in words is "twelve trillion, one billion, one million, nine hundred seventy-eight thousand, two hundred one".