21031133203103 has 16 divisors (see below), whose sum is σ = 22009773265152. Its totient is φ = 20071328256000.

The previous prime is 21031133203099. The next prime is 21031133203111. The reversal of 21031133203103 is 30130233113012.

It is a cyclic number.

It is not a de Polignac number, because 21031133203103 - 2² = 21031133203099 is a prime.

It is a super-3 number, since 3×21031133203103³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031133203133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17151563 + ... + 18336803.

It is an arithmetic number, because the mean of its divisors is an integer number (1375610829072).

Almost surely, 2^{21031133203103} is an apocalyptic number.

21031133203103 is a deficient number, since it is larger than the sum of its proper divisors (978640062049).

21031133203103 is a wasteful number, since it uses less digits than its factorization.

21031133203103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193186.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 21031133203103 its reverse (30130233113012), we get a palindrome (51161366316115).

Subtracting 21031133203103 from its reverse (30130233113012), we obtain a palindrome (9099099909909).

The spelling of 21031133203103 in words is "twenty-one trillion, thirty-one billion, one hundred thirty-three million, two hundred three thousand, one hundred three".