21002100001133 has 2 divisors, whose sum is σ = 21002100001134. Its totient is φ = 21002100001132.

The previous prime is 21002100001097. The next prime is 21002100001189. The reversal of 21002100001133 is 33110000120012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11827422566404 + 9174677434729 = 3439102^2 + 3028973^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21002100001133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21002100001733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501050000566 + 10501050000567.

It is an arithmetic number, because the mean of its divisors is an integer number (10501050000567).

Almost surely, 2^{21002100001133} is an apocalyptic number.

It is an amenable number.

21002100001133 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002100001133 is an equidigital number, since it uses as much as digits as its factorization.

21002100001133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21002100001133 its reverse (33110000120012), we get a palindrome (54112100121145).

The spelling of 21002100001133 in words is "twenty-one trillion, two billion, one hundred million, one thousand, one hundred thirty-three".