12002002021 has 8 divisors (see below), whose sum is σ = 12329264160. Its totient is φ = 11674891728.

The previous prime is 12002002009. The next prime is 12002002043. The reversal of 12002002021 is 12020020021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12002002021 - 2¹⁵ = 12001969253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12002001989 and 12002002007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002002081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132570 + ... + 203908.

It is an arithmetic number, because the mean of its divisors is an integer number (1541158020).

Almost surely, 2^12002002021 is an apocalyptic number.

It is an amenable number.

12002002021 is a deficient number, since it is larger than the sum of its proper divisors (327262139).

12002002021 is an equidigital number, since it uses as much as digits as its factorization.

12002002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75923.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 12002002021 its reverse (12020020021), we get a palindrome (24022022042).

The spelling of 12002002021 in words is "twelve billion, two million, two thousand, twenty-one".