21021103103333 has 2 divisors, whose sum is σ = 21021103103334. Its totient is φ = 21021103103332.

The previous prime is 21021103103327. The next prime is 21021103103347. The reversal of 21021103103333 is 33330130112012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10523127259969 + 10497975843364 = 3243937^2 + 3240058^2 .

It is a cyclic number.

It is not a de Polignac number, because 21021103103333 - 2⁴² = 16623056592229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21021103103299 and 21021103103308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21021103103303) 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 as a sum of consecutive naturals, namely, 10510551551666 + 10510551551667.

It is an arithmetic number, because the mean of its divisors is an integer number (10510551551667).

Almost surely, 2^{21021103103333} is an apocalyptic number.

It is an amenable number.

21021103103333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21021103103333 is an equidigital number, since it uses as much as digits as its factorization.

21021103103333 is an odious number, because the sum of its binary digits is odd.

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

Adding to 21021103103333 its reverse (33330130112012), we get a palindrome (54351233215345).

The spelling of 21021103103333 in words is "twenty-one trillion, twenty-one billion, one hundred three million, one hundred three thousand, three hundred thirty-three".