12001011211009 has 4 divisors (see below), whose sum is σ = 12019167053140. Its totient is φ = 11982855368880.

The previous prime is 12001011211001. The next prime is 12001011211073. The reversal of 12001011211009 is 90011211010021.

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 5412471966784 + 6588539244225 = 2326472^2 + 2566815^2 .

It is a cyclic number.

It is not a de Polignac number, because 12001011211009 - 2³ = 12001011211001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12001011211001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9077920074 + ... + 9077921395.

It is an arithmetic number, because the mean of its divisors is an integer number (3004791763285).

Almost surely, 2^{12001011211009} is an apocalyptic number.

It is an amenable number.

12001011211009 is a deficient number, since it is larger than the sum of its proper divisors (18155842131).

12001011211009 is an equidigital number, since it uses as much as digits as its factorization.

12001011211009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18155842130.

The product of its (nonzero) digits is 36, while the sum is 19.

The spelling of 12001011211009 in words is "twelve trillion, one billion, eleven million, two hundred eleven thousand, nine".