12004001421 has 8 divisors (see below), whose sum is σ = 16010596800. Its totient is φ = 8000036832.

The previous prime is 12004001417. The next prime is 12004001441. The reversal of 12004001421 is 12410040021.

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

It is not a de Polignac number, because 12004001421 - 2² = 12004001417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12004001421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12004001441) 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 7 ways as a sum of consecutive naturals, for example, 647025 + ... + 665318.

It is an arithmetic number, because the mean of its divisors is an integer number (2001324600).

Almost surely, 2^12004001421 is an apocalyptic number.

It is an amenable number.

12004001421 is a deficient number, since it is larger than the sum of its proper divisors (4006595379).

12004001421 is a wasteful number, since it uses less digits than its factorization.

12004001421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315395.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12004001421 its reverse (12410040021), we get a palindrome (24414041442).

The spelling of 12004001421 in words is "twelve billion, four million, one thousand, four hundred twenty-one".