21102340044103 has 4 divisors (see below), whose sum is σ = 21448280044888. Its totient is φ = 20756400043320.

The previous prime is 21102340044077. The next prime is 21102340044109. The reversal of 21102340044103 is 30144004320112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21102340044103 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 (21102340044109) 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, 172970000301 + ... + 172970000422.

It is an arithmetic number, because the mean of its divisors is an integer number (5362070011222).

Almost surely, 2^{21102340044103} is an apocalyptic number.

21102340044103 is a deficient number, since it is larger than the sum of its proper divisors (345940000785).

21102340044103 is an equidigital number, since it uses as much as digits as its factorization.

21102340044103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345940000784.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21102340044103 its reverse (30144004320112), we get a palindrome (51246344364215).

The spelling of 21102340044103 in words is "twenty-one trillion, one hundred two billion, three hundred forty million, forty-four thousand, one hundred three".