12001122111001 has 4 divisors (see below), whose sum is σ = 12204530960400. Its totient is φ = 11797713261604.

The previous prime is 12001122110981. The next prime is 12001122111023. The reversal of 12001122111001 is 10011122110021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12001122111001 - 2³³ = 11992532176409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12001122171001) 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, 101704424611 + ... + 101704424728.

It is an arithmetic number, because the mean of its divisors is an integer number (3051132740100).

Almost surely, 2^{12001122111001} is an apocalyptic number.

It is an amenable number.

12001122111001 is a deficient number, since it is larger than the sum of its proper divisors (203408849399).

12001122111001 is an equidigital number, since it uses as much as digits as its factorization.

12001122111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203408849398.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12001122111001 its reverse (10011122110021), we get a palindrome (22012244221022).

The spelling of 12001122111001 in words is "twelve trillion, one billion, one hundred twenty-two million, one hundred eleven thousand, one".