21102221310203 has 16 divisors (see below), whose sum is σ = 23280106514400. Its totient is φ = 18967601959680.

The previous prime is 21102221310193. The next prime is 21102221310217. The reversal of 21102221310203 is 30201312220112.

It is not a de Polignac number, because 21102221310203 - 2¹⁰ = 21102221309179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21102221310223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27691025 + ... + 28442877.

It is an arithmetic number, because the mean of its divisors is an integer number (1455006657150).

Almost surely, 2^{21102221310203} is an apocalyptic number.

21102221310203 is a deficient number, since it is larger than the sum of its proper divisors (2177885204197).

21102221310203 is a wasteful number, since it uses less digits than its factorization.

21102221310203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780622.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21102221310203 its reverse (30201312220112), we get a palindrome (51303533530315).

Subtracting 21102221310203 from its reverse (30201312220112), we obtain a palindrome (9099090909909).

The spelling of 21102221310203 in words is "twenty-one trillion, one hundred two billion, two hundred twenty-one million, three hundred ten thousand, two hundred three".