12001120001001 has 48 divisors (see below), whose sum is σ = 19035162566784. Its totient is φ = 7529835043584.

The previous prime is 12001120000951. The next prime is 12001120001021. The reversal of 12001120001001 is 10010002110021.

It is a happy number.

It is not a de Polignac number, because 12001120001001 - 2¹¹ = 12001119998953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (12001120001021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 218242156 + ... + 218297138.

It is an arithmetic number, because the mean of its divisors is an integer number (396565886808).

Almost surely, 2^{12001120001001} is an apocalyptic number.

It is an amenable number.

12001120001001 is a deficient number, since it is larger than the sum of its proper divisors (7034042565783).

12001120001001 is an equidigital number, since it uses as much as digits as its factorization.

12001120001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107852 (or 107840 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 12001120001001 its reverse (10010002110021), we get a palindrome (22011122111022).

The spelling of 12001120001001 in words is "twelve trillion, one billion, one hundred twenty million, one thousand, one".