21301223021333 has 2 divisors, whose sum is σ = 21301223021334. Its totient is φ = 21301223021332.

The previous prime is 21301223021237. The next prime is 21301223021389. The reversal of 21301223021333 is 33312032210312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14186424321169 + 7114798700164 = 3766487^2 + 2667358^2 .

It is a cyclic number.

It is not a de Polignac number, because 21301223021333 - 2¹⁴ = 21301223004949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21301222021333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650611510666 + 10650611510667.

It is an arithmetic number, because the mean of its divisors is an integer number (10650611510667).

Almost surely, 2^{21301223021333} is an apocalyptic number.

It is an amenable number.

21301223021333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21301223021333 is an equidigital number, since it uses as much as digits as its factorization.

21301223021333 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 21301223021333 its reverse (33312032210312), we get a palindrome (54613255231645).

The spelling of 21301223021333 in words is "twenty-one trillion, three hundred one billion, two hundred twenty-three million, twenty-one thousand, three hundred thirty-three".