12001212011001 has 4 divisors (see below), whose sum is σ = 16001616014672. Its totient is φ = 8000808007332.

The previous prime is 12001212010973. The next prime is 12001212011003. The reversal of 12001212011001 is 10011021210021.

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 not a de Polignac number, because 12001212011001 - 2¹⁰ = 12001212009977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12001212011003) 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, 2000202001831 + ... + 2000202001836.

It is an arithmetic number, because the mean of its divisors is an integer number (4000404003668).

Almost surely, 2^{12001212011001} is an apocalyptic number.

It is an amenable number.

12001212011001 is a deficient number, since it is larger than the sum of its proper divisors (4000404003671).

12001212011001 is an equidigital number, since it uses as much as digits as its factorization.

12001212011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4000404003670.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12001212011001 its reverse (10011021210021), we get a palindrome (22012233221022).

The spelling of 12001212011001 in words is "twelve trillion, one billion, two hundred twelve million, eleven thousand, one".