12002021 has 8 divisors (see below), whose sum is σ = 12566400. Its totient is φ = 11441232.

The previous prime is 12001999. The next prime is 12002059. The reversal of 12002021 is 12020021.

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 12002021 - 2²² = 7807717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002321) 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, 7880 + ... + 9278.

It is an arithmetic number, because the mean of its divisors is an integer number (1570800).

Almost surely, 2^12002021 is an apocalyptic number.

It is an amenable number.

12002021 is a deficient number, since it is larger than the sum of its proper divisors (564379).

12002021 is a wasteful number, since it uses less digits than its factorization.

12002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795.

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

The square root of 12002021 is about 3464.3933090802. The cubic root of 12002021 is about 228.9557003863.

Adding to 12002021 its reverse (12020021), we get a palindrome (24022042).

The spelling of 12002021 in words is "twelve million, two thousand, twenty-one".