12001212001 has 4 divisors (see below), whose sum is σ = 12388347904. Its totient is φ = 11614076100.

The previous prime is 12001211987. The next prime is 12001212019. The reversal of 12001212001 is 10021210021.

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 12001212001 - 2⁵ = 12001211969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12001222001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193567905 + ... + 193567966.

It is an arithmetic number, because the mean of its divisors is an integer number (3097086976).

Almost surely, 2^12001212001 is an apocalyptic number.

It is an amenable number.

12001212001 is a deficient number, since it is larger than the sum of its proper divisors (387135903).

12001212001 is an equidigital number, since it uses as much as digits as its factorization.

12001212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387135902.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12001212001 its reverse (10021210021), we get a palindrome (22022422022).

The spelling of 12001212001 in words is "twelve billion, one million, two hundred twelve thousand, one".