12002320421 has 16 divisors (see below), whose sum is σ = 14798112000. Its totient is φ = 9479611008.

The previous prime is 12002320417. The next prime is 12002320423. The reversal of 12002320421 is 12402320021.

It is not a de Polignac number, because 12002320421 - 2² = 12002320417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12002320421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002320423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64121 + ... + 167678.

It is an arithmetic number, because the mean of its divisors is an integer number (924882000).

Almost surely, 2^12002320421 is an apocalyptic number.

It is an amenable number.

12002320421 is a deficient number, since it is larger than the sum of its proper divisors (2795791579).

12002320421 is a wasteful number, since it uses less digits than its factorization.

12002320421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232388.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 12002320421 its reverse (12402320021), we get a palindrome (24404640442).

The spelling of 12002320421 in words is "twelve billion, two million, three hundred twenty thousand, four hundred twenty-one".