21103030002 has 64 divisors (see below), whose sum is σ = 44929914624. Its totient is φ = 6584954880.

The previous prime is 21103030001. The next prime is 21103030021. The reversal of 21103030002 is 20003030112.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21103030002.

It is not an unprimeable number, because it can be changed into a prime (21103030001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21599338 + ... + 21600314.

It is an arithmetic number, because the mean of its divisors is an integer number (702029916).

Almost surely, 2^21103030002 is an apocalyptic number.

21103030002 is an abundant number, since it is smaller than the sum of its proper divisors (23826884622).

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

21103030002 is a wasteful number, since it uses less digits than its factorization.

21103030002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1923.

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 21103030002 its reverse (20003030112), we get a palindrome (41106060114).

The spelling of 21103030002 in words is "twenty-one billion, one hundred three million, thirty thousand, two".