21210120000233 has 2 divisors, whose sum is σ = 21210120000234. Its totient is φ = 21210120000232.

The previous prime is 21210120000161. The next prime is 21210120000239. The reversal of 21210120000233 is 33200002101212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12502503948544 + 8707616051689 = 3535888^2 + 2950867^2 .

It is a cyclic number.

It is not a de Polignac number, because 21210120000233 - 2¹⁶ = 21210119934697 is a prime.

It is not a weakly prime, because it can be changed into another prime (21210120000239) 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, 10605060000116 + 10605060000117.

It is an arithmetic number, because the mean of its divisors is an integer number (10605060000117).

Almost surely, 2^{21210120000233} is an apocalyptic number.

It is an amenable number.

21210120000233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210120000233 is an equidigital number, since it uses as much as digits as its factorization.

21210120000233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21210120000233 its reverse (33200002101212), we get a palindrome (54410122101445).

The spelling of 21210120000233 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty million, two hundred thirty-three", and thus it is an aban number.