21012200333 has 2 divisors, whose sum is σ = 21012200334. Its totient is φ = 21012200332.

The previous prime is 21012200327. The next prime is 21012200393. The reversal of 21012200333 is 33300221012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16388608324 + 4623592009 = 128018^2 + 67997^2 .

It is a cyclic number.

It is not a de Polignac number, because 21012200333 - 2¹² = 21012196237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21012200323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506100166 + 10506100167.

It is an arithmetic number, because the mean of its divisors is an integer number (10506100167).

Almost surely, 2^21012200333 is an apocalyptic number.

It is an amenable number.

21012200333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012200333 is an equidigital number, since it uses as much as digits as its factorization.

21012200333 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21012200333 its reverse (33300221012), we get a palindrome (54312421345).

The spelling of 21012200333 in words is "twenty-one billion, twelve million, two hundred thousand, three hundred thirty-three".