21103103023210 has 48 divisors (see below), whose sum is σ = 41359571318520. Its totient is φ = 7748865596160.

The previous prime is 21103103023159. The next prime is 21103103023229. The reversal of 21103103023210 is 1232030130112.

It can be written as a sum of positive squares in 12 ways, for example, as 5229596022561 + 15873507000649 = 2286831^2 + 3984157^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34188705 + ... + 34800484.

Almost surely, 2^{21103103023210} is an apocalyptic number.

21103103023210 is a deficient number, since it is larger than the sum of its proper divisors (20256468295310).

21103103023210 is a wasteful number, since it uses less digits than its factorization.

21103103023210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68989403 (or 68989390 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21103103023210 its reverse (1232030130112), we get a palindrome (22335133153322).

The spelling of 21103103023210 in words is "twenty-one trillion, one hundred three billion, one hundred three million, twenty-three thousand, two hundred ten".