21031300032103 has 4 divisors (see below), whose sum is σ = 21076334936280. Its totient is φ = 20986265127928.

The previous prime is 21031300032077. The next prime is 21031300032109. The reversal of 21031300032103 is 30123000313012.

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 21031300032103 - 2³⁷ = 20893861078631 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 (21031300032109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22517451388 + ... + 22517452321.

It is an arithmetic number, because the mean of its divisors is an integer number (5269083734070).

Almost surely, 2^{21031300032103} is an apocalyptic number.

21031300032103 is a deficient number, since it is larger than the sum of its proper divisors (45034904177).

21031300032103 is an equidigital number, since it uses as much as digits as its factorization.

21031300032103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45034904176.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21031300032103 its reverse (30123000313012), we get a palindrome (51154300345115).

The spelling of 21031300032103 in words is "twenty-one trillion, thirty-one billion, three hundred million, thirty-two thousand, one hundred three".