21013233331103 has 4 divisors (see below), whose sum is σ = 22629635895048. Its totient is φ = 19396830767160.

The previous prime is 21013233331099. The next prime is 21013233331121. The reversal of 21013233331103 is 30113333231012.

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 21013233331103 - 2² = 21013233331099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013233321103) 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, 808201281953 + ... + 808201281978.

It is an arithmetic number, because the mean of its divisors is an integer number (5657408973762).

Almost surely, 2^{21013233331103} is an apocalyptic number.

21013233331103 is a deficient number, since it is larger than the sum of its proper divisors (1616402563945).

21013233331103 is a wasteful number, since it uses less digits than its factorization.

21013233331103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616402563944.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 21013233331103 its reverse (30113333231012), we get a palindrome (51126566562115).

The spelling of 21013233331103 in words is "twenty-one trillion, thirteen billion, two hundred thirty-three million, three hundred thirty-one thousand, one hundred three".