21103011002 has 8 divisors (see below), whose sum is σ = 31685891700. Its totient is φ = 10541047104.

The previous prime is 21103010989. The next prime is 21103011011. The reversal of 21103011002 is 20011030112.

It can be written as a sum of positive squares in 2 ways, for example, as 21039792601 + 63218401 = 145051^2 + 7951^2 .

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

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, 5226677 + ... + 5230712.

Almost surely, 2^21103011002 is an apocalyptic number.

21103011002 is a deficient number, since it is larger than the sum of its proper divisors (10582880698).

21103011002 is a wasteful number, since it uses less digits than its factorization.

21103011002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10458400.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21103011002 its reverse (20011030112), we get a palindrome (41114041114).

The spelling of 21103011002 in words is "twenty-one billion, one hundred three million, eleven thousand, two".