21000200120233 has 2 divisors, whose sum is σ = 21000200120234. Its totient is φ = 21000200120232.

The previous prime is 21000200120113. The next prime is 21000200120267. The reversal of 21000200120233 is 33202100200012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19475698744384 + 1524501375849 = 4413128^2 + 1234707^2 .

It is a cyclic number.

It is not a de Polignac number, because 21000200120233 - 2⁴¹ = 18801176864681 is a prime.

It is not a weakly prime, because it can be changed into another prime (21000200121233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500100060116 + 10500100060117.

It is an arithmetic number, because the mean of its divisors is an integer number (10500100060117).

Almost surely, 2^{21000200120233} is an apocalyptic number.

It is an amenable number.

21000200120233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000200120233 is an equidigital number, since it uses as much as digits as its factorization.

21000200120233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21000200120233 its reverse (33202100200012), we get a palindrome (54202300320245).

The spelling of 21000200120233 in words is "twenty-one trillion, two hundred million, one hundred twenty thousand, two hundred thirty-three".