21110103103 has 4 divisors (see below), whose sum is σ = 21192243840. Its totient is φ = 21027962368.

The previous prime is 21110103097. The next prime is 21110103163. The reversal of 21110103103 is 30130101112.

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 21110103103 - 2¹³ = 21110094911 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 (21110103163) 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, 41069983 + ... + 41070496.

It is an arithmetic number, because the mean of its divisors is an integer number (5298060960).

Almost surely, 2^21110103103 is an apocalyptic number.

21110103103 is a deficient number, since it is larger than the sum of its proper divisors (82140737).

21110103103 is an equidigital number, since it uses as much as digits as its factorization.

21110103103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82140736.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 21110103103 its reverse (30130101112), we get a palindrome (51240204215).

The spelling of 21110103103 in words is "twenty-one billion, one hundred ten million, one hundred three thousand, one hundred three".