12002443021 has 8 divisors (see below), whose sum is σ = 12200969088. Its totient is φ = 11803974000.

The previous prime is 12002442961. The next prime is 12002443049. The reversal of 12002443021 is 12034420021.

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 12002443021 - 2¹⁷ = 12002311949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12002443021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002443091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 713376 + ... + 730006.

It is an arithmetic number, because the mean of its divisors is an integer number (1525121136).

Almost surely, 2^12002443021 is an apocalyptic number.

It is an amenable number.

12002443021 is a deficient number, since it is larger than the sum of its proper divisors (198526067).

12002443021 is a wasteful number, since it uses less digits than its factorization.

12002443021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28523.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 12002443021 its reverse (12034420021), we get a palindrome (24036863042).

The spelling of 12002443021 in words is "twelve billion, two million, four hundred forty-three thousand, twenty-one".