216421321002 has 8 divisors (see below), whose sum is σ = 432842642016. Its totient is φ = 72140440332.

The previous prime is 216421320991. The next prime is 216421321009. The reversal of 216421321002 is 200123124612.

216421321002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

216421321002 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (216421321009) 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 3 ways as a sum of consecutive naturals, for example, 18035110078 + ... + 18035110089.

It is an arithmetic number, because the mean of its divisors is an integer number (54105330252).

Almost surely, 2^216421321002 is an apocalyptic number.

216421321002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216421321002 is a wasteful number, since it uses less digits than its factorization.

216421321002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36070220172.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 216421321002 its reverse (200123124612), we get a palindrome (416544445614).

The spelling of 216421321002 in words is "two hundred sixteen billion, four hundred twenty-one million, three hundred twenty-one thousand, two".