21330013303133 has 2 divisors, whose sum is σ = 21330013303134. Its totient is φ = 21330013303132.

The previous prime is 21330013303121. The next prime is 21330013303163. The reversal of 21330013303133 is 33130331003312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19027549995364 + 2302463307769 = 4362058^2 + 1517387^2 .

It is a cyclic number.

It is not a de Polignac number, because 21330013303133 - 2⁸ = 21330013302877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21330013303163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665006651566 + 10665006651567.

It is an arithmetic number, because the mean of its divisors is an integer number (10665006651567).

Almost surely, 2^{21330013303133} is an apocalyptic number.

It is an amenable number.

21330013303133 is a deficient number, since it is larger than the sum of its proper divisors (1).

21330013303133 is an equidigital number, since it uses as much as digits as its factorization.

21330013303133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 26.

Adding to 21330013303133 its reverse (33130331003312), we get a palindrome (54460344306445).

The spelling of 21330013303133 in words is "twenty-one trillion, three hundred thirty billion, thirteen million, three hundred three thousand, one hundred thirty-three".