12001121111001 has 16 divisors (see below), whose sum is σ = 17471803946688. Its totient is φ = 7266895156800.

The previous prime is 12001121110991. The next prime is 12001121111011. The reversal of 12001121111001 is 10011112110021.

It is an interprime number because it is at equal distance from previous prime (12001121110991) and next prime (12001121111011).

It is not a de Polignac number, because 12001121111001 - 2²³ = 12001112722393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12001121111011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162752010 + ... + 162825731.

It is an arithmetic number, because the mean of its divisors is an integer number (1091987746668).

Almost surely, 2^{12001121111001} is an apocalyptic number.

12001121111001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12001121111001 is a deficient number, since it is larger than the sum of its proper divisors (5470682835687).

12001121111001 is a wasteful number, since it uses less digits than its factorization.

12001121111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325578872.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 12001121111001 its reverse (10011112110021), we get a palindrome (22012233221022).

The spelling of 12001121111001 in words is "twelve trillion, one billion, one hundred twenty-one million, one hundred eleven thousand, one".