21031013220333 has 4 divisors (see below), whose sum is σ = 28041350960448. Its totient is φ = 14020675480220.

The previous prime is 21031013220299. The next prime is 21031013220353. The reversal of 21031013220333 is 33302231013012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21031013220333 - 2¹⁰ = 21031013219309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031013220353) 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, 3505168870053 + ... + 3505168870058.

It is an arithmetic number, because the mean of its divisors is an integer number (7010337740112).

Almost surely, 2^{21031013220333} is an apocalyptic number.

It is an amenable number.

21031013220333 is a deficient number, since it is larger than the sum of its proper divisors (7010337740115).

21031013220333 is an equidigital number, since it uses as much as digits as its factorization.

21031013220333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7010337740114.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 21031013220333 its reverse (33302231013012), we get a palindrome (54333244233345).

The spelling of 21031013220333 in words is "twenty-one trillion, thirty-one billion, thirteen million, two hundred twenty thousand, three hundred thirty-three".