12001100001001 has 4 divisors (see below), whose sum is σ = 12070470521412. Its totient is φ = 11931729480592.

The previous prime is 12001100000971. The next prime is 12001100001013. The reversal of 12001100001001 is 10010000110021.

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 5478572203225 + 6522527797776 = 2340635^2 + 2553924^2 .

It is a cyclic number.

It is not a de Polignac number, because 12001100001001 - 2²¹ = 12001097903849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12001100001091) 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, 34685259946 + ... + 34685260291.

It is an arithmetic number, because the mean of its divisors is an integer number (3017617630353).

Almost surely, 2^{12001100001001} is an apocalyptic number.

It is an amenable number.

12001100001001 is a deficient number, since it is larger than the sum of its proper divisors (69370520411).

12001100001001 is an equidigital number, since it uses as much as digits as its factorization.

12001100001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69370520410.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 12001100001001 its reverse (10010000110021), we get a palindrome (22011100111022).

The spelling of 12001100001001 in words is "twelve trillion, one billion, one hundred million, one thousand, one".