21013001333 has 2 divisors, whose sum is σ = 21013001334. Its totient is φ = 21013001332.

The previous prime is 21013001329. The next prime is 21013001363. The reversal of 21013001333 is 33310031012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19627449604 + 1385551729 = 140098^2 + 37223^2 .

It is a cyclic number.

It is not a de Polignac number, because 21013001333 - 2² = 21013001329 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21013001363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506500666 + 10506500667.

It is an arithmetic number, because the mean of its divisors is an integer number (10506500667).

Almost surely, 2^21013001333 is an apocalyptic number.

It is an amenable number.

21013001333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21013001333 is an equidigital number, since it uses as much as digits as its factorization.

21013001333 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 21013001333 its reverse (33310031012), we get a palindrome (54323032345).

The spelling of 21013001333 in words is "twenty-one billion, thirteen million, one thousand, three hundred thirty-three".