21102103303 has 4 divisors (see below), whose sum is σ = 21102472888. Its totient is φ = 21101733720.

The previous prime is 21102103291. The next prime is 21102103307. The reversal of 21102103303 is 30330120112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21102103303 - 2²⁵ = 21068548871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102103307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78933 + ... + 220078.

It is an arithmetic number, because the mean of its divisors is an integer number (5275618222).

Almost surely, 2^21102103303 is an apocalyptic number.

21102103303 is a deficient number, since it is larger than the sum of its proper divisors (369585).

21102103303 is an equidigital number, since it uses as much as digits as its factorization.

21102103303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369584.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21102103303 its reverse (30330120112), we get a palindrome (51432223415).

The spelling of 21102103303 in words is "twenty-one billion, one hundred two million, one hundred three thousand, three hundred three".