21210001020233 has 2 divisors, whose sum is σ = 21210001020234. Its totient is φ = 21210001020232.

The previous prime is 21210001020209. The next prime is 21210001020253. The reversal of 21210001020233 is 33202010001212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13447241034304 + 7762759985929 = 3667048^2 + 2786173^2 .

It is a cyclic number.

It is not a de Polignac number, because 21210001020233 - 2²⁴ = 21209984243017 is a prime.

It is not a weakly prime, because it can be changed into another prime (21210001020253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605000510116 + 10605000510117.

It is an arithmetic number, because the mean of its divisors is an integer number (10605000510117).

Almost surely, 2^{21210001020233} is an apocalyptic number.

It is an amenable number.

21210001020233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210001020233 is an equidigital number, since it uses as much as digits as its factorization.

21210001020233 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 21210001020233 its reverse (33202010001212), we get a palindrome (54412011021445).

The spelling of 21210001020233 in words is "twenty-one trillion, two hundred ten billion, one million, twenty thousand, two hundred thirty-three".