21002020002133 has 2 divisors, whose sum is σ = 21002020002134. Its totient is φ = 21002020002132.

The previous prime is 21002020002109. The next prime is 21002020002241. The reversal of 21002020002133 is 33120002020012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20757072216049 + 244947786084 = 4555993^2 + 494922^2 .

It is a cyclic number.

It is not a de Polignac number, because 21002020002133 - 2⁵ = 21002020002101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21002020002433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501010001066 + 10501010001067.

It is an arithmetic number, because the mean of its divisors is an integer number (10501010001067).

Almost surely, 2^{21002020002133} is an apocalyptic number.

It is an amenable number.

21002020002133 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002020002133 is an equidigital number, since it uses as much as digits as its factorization.

21002020002133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21002020002133 its reverse (33120002020012), we get a palindrome (54122022022145).

The spelling of 21002020002133 in words is "twenty-one trillion, two billion, twenty million, two thousand, one hundred thirty-three".