21110130103 has 4 divisors (see below), whose sum is σ = 22351902480. Its totient is φ = 19868357728.

The previous prime is 21110130077. The next prime is 21110130121. The reversal of 21110130103 is 30103101112.

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 21110130103 - 2⁵ = 21110130071 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 (21110130193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 620886163 + ... + 620886196.

It is an arithmetic number, because the mean of its divisors is an integer number (5587975620).

Almost surely, 2^21110130103 is an apocalyptic number.

21110130103 is a deficient number, since it is larger than the sum of its proper divisors (1241772377).

21110130103 is a wasteful number, since it uses less digits than its factorization.

21110130103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241772376.

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

Adding to 21110130103 its reverse (30103101112), we get a palindrome (51213231215).

The spelling of 21110130103 in words is "twenty-one billion, one hundred ten million, one hundred thirty thousand, one hundred three".