21000132233 has 2 divisors, whose sum is σ = 21000132234. Its totient is φ = 21000132232.

The previous prime is 21000132163. The next prime is 21000132247. The reversal of 21000132233 is 33223100012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16809900409 + 4190231824 = 129653^2 + 64732^2 .

It is a cyclic number.

It is not a de Polignac number, because 21000132233 - 2¹⁴ = 21000115849 is a prime.

It is not a weakly prime, because it can be changed into another prime (21000132253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500066116 + 10500066117.

It is an arithmetic number, because the mean of its divisors is an integer number (10500066117).

Almost surely, 2^21000132233 is an apocalyptic number.

It is an amenable number.

21000132233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000132233 is an equidigital number, since it uses as much as digits as its factorization.

21000132233 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 21000132233 its reverse (33223100012), we get a palindrome (54223232245).

The spelling of 21000132233 in words is "twenty-one billion, one hundred thirty-two thousand, two hundred thirty-three".