21010331320103 has 8 divisors (see below), whose sum is σ = 22246838982720. Its totient is φ = 19773890970880.

The previous prime is 21010331320081. The next prime is 21010331320163. The reversal of 21010331320103 is 30102313301012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21010331320103 - 2¹⁶ = 21010331254567 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 (21010331320163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16185023 + ... + 17434896.

It is an arithmetic number, because the mean of its divisors is an integer number (2780854872840).

Almost surely, 2^{21010331320103} is an apocalyptic number.

21010331320103 is a deficient number, since it is larger than the sum of its proper divisors (1236507662617).

21010331320103 is a wasteful number, since it uses less digits than its factorization.

21010331320103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33656697.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21010331320103 its reverse (30102313301012), we get a palindrome (51112644621115).

The spelling of 21010331320103 in words is "twenty-one trillion, ten billion, three hundred thirty-one million, three hundred twenty thousand, one hundred three".