21002110210002 has 8 divisors (see below), whose sum is σ = 42004220420016. Its totient is φ = 7000703403332.

The previous prime is 21002110209989. The next prime is 21002110210063. The reversal of 21002110210002 is 20001201120012.

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

21002110210002 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 21002110210002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1750175850828 + ... + 1750175850839.

It is an arithmetic number, because the mean of its divisors is an integer number (5250527552502).

Almost surely, 2^{21002110210002} is an apocalyptic number.

21002110210002 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.

21002110210002 is a wasteful number, since it uses less digits than its factorization.

21002110210002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500351701672.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21002110210002 its reverse (20001201120012), we get a palindrome (41003311330014).

The spelling of 21002110210002 in words is "twenty-one trillion, two billion, one hundred ten million, two hundred ten thousand, two".