21200102103 has 4 divisors (see below), whose sum is σ = 28266802808. Its totient is φ = 14133401400.

The previous prime is 21200102081. The next prime is 21200102159. The reversal of 21200102103 is 30120100212.

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

It is not a de Polignac number, because 21200102103 - 2⁵ = 21200102071 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 (21200102173) 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, 3533350348 + ... + 3533350353.

It is an arithmetic number, because the mean of its divisors is an integer number (7066700702).

Almost surely, 2^21200102103 is an apocalyptic number.

21200102103 is a deficient number, since it is larger than the sum of its proper divisors (7066700705).

21200102103 is an equidigital number, since it uses as much as digits as its factorization.

21200102103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7066700704.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21200102103 its reverse (30120100212), we get a palindrome (51320202315).

The spelling of 21200102103 in words is "twenty-one billion, two hundred million, one hundred two thousand, one hundred three".