12020001001 has 4 divisors (see below), whose sum is σ = 12299535952. Its totient is φ = 11740466052.

The previous prime is 12020000983. The next prime is 12020001047. The reversal of 12020001001 is 10010002021.

12020001001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12020001001 - 2¹¹ = 12019998953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12020001061) 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, 139767411 + ... + 139767496.

It is an arithmetic number, because the mean of its divisors is an integer number (3074883988).

Almost surely, 2^12020001001 is an apocalyptic number.

It is an amenable number.

12020001001 is a deficient number, since it is larger than the sum of its proper divisors (279534951).

12020001001 is an equidigital number, since it uses as much as digits as its factorization.

12020001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279534950.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 12020001001 its reverse (10010002021), we get a palindrome (22030003022).

The spelling of 12020001001 in words is "twelve billion, twenty million, one thousand, one".