21030002002 has 8 divisors (see below), whose sum is σ = 32278607856. Its totient is φ = 10270466052.

The previous prime is 21030001961. The next prime is 21030002017. The reversal of 21030002002 is 20020003012.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21030002002.

It is an unprimeable number.

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, 122267368 + ... + 122267539.

It is an arithmetic number, because the mean of its divisors is an integer number (4034825982).

Almost surely, 2^21030002002 is an apocalyptic number.

21030002002 is a deficient number, since it is larger than the sum of its proper divisors (11248605854).

21030002002 is a wasteful number, since it uses less digits than its factorization.

21030002002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244534952.

The product of its (nonzero) digits is 24, while the sum is 10.

Adding to 21030002002 its reverse (20020003012), we get a palindrome (41050005014).

The spelling of 21030002002 in words is "twenty-one billion, thirty million, two thousand, two".