21331020223103 has 4 divisors (see below), whose sum is σ = 21331165620240. Its totient is φ = 21330874825968.

The previous prime is 21331020223087. The next prime is 21331020223111. The reversal of 21331020223103 is 30132202013312.

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 21331020223103 - 2⁴ = 21331020223087 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 (21331020223133) 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, 72478283 + ... + 72771996.

It is an arithmetic number, because the mean of its divisors is an integer number (5332791405060).

Almost surely, 2^{21331020223103} is an apocalyptic number.

21331020223103 is a deficient number, since it is larger than the sum of its proper divisors (145397137).

21331020223103 is a wasteful number, since it uses less digits than its factorization.

21331020223103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145397136.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21331020223103 its reverse (30132202013312), we get a palindrome (51463222236415).

The spelling of 21331020223103 in words is "twenty-one trillion, three hundred thirty-one billion, twenty million, two hundred twenty-three thousand, one hundred three".