21302102103 has 16 divisors (see below), whose sum is σ = 28743511680. Its totient is φ = 14032058976.

The previous prime is 21302102099. The next prime is 21302102117. The reversal of 21302102103 is 30120120312.

It is not a de Polignac number, because 21302102103 - 2² = 21302102099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302102903) 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, 42025 + ... + 210642.

It is an arithmetic number, because the mean of its divisors is an integer number (1796469480).

Almost surely, 2^21302102103 is an apocalyptic number.

21302102103 is a deficient number, since it is larger than the sum of its proper divisors (7441409577).

21302102103 is a wasteful number, since it uses less digits than its factorization.

21302102103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253006.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21302102103 its reverse (30120120312), we get a palindrome (51422222415).

The spelling of 21302102103 in words is "twenty-one billion, three hundred two million, one hundred two thousand, one hundred three".