21301001333 has 2 divisors, whose sum is σ = 21301001334. Its totient is φ = 21301001332.

The previous prime is 21301001329. The next prime is 21301001341. The reversal of 21301001333 is 33310010312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14804318929 + 6496682404 = 121673^2 + 80602^2 .

It is a cyclic number.

It is not a de Polignac number, because 21301001333 - 2² = 21301001329 is a prime.

It is a super-3 number, since 3×21301001333³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21301051333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650500666 + 10650500667.

It is an arithmetic number, because the mean of its divisors is an integer number (10650500667).

Almost surely, 2^21301001333 is an apocalyptic number.

It is an amenable number.

21301001333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21301001333 is an equidigital number, since it uses as much as digits as its factorization.

21301001333 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 21301001333 its reverse (33310010312), we get a palindrome (54611011645).

The spelling of 21301001333 in words is "twenty-one billion, three hundred one million, one thousand, three hundred thirty-three".