21056101333 has 2 divisors, whose sum is σ = 21056101334. Its totient is φ = 21056101332.

The previous prime is 21056101331. The next prime is 21056101337. The reversal of 21056101333 is 33310165012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20898171844 + 157929489 = 144562^2 + 12567^2 .

It is a cyclic number.

It is not a de Polignac number, because 21056101333 - 2¹ = 21056101331 is a prime.

Together with 21056101331, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 21056101298 and 21056101307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21056101331) 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, 10528050666 + 10528050667.

It is an arithmetic number, because the mean of its divisors is an integer number (10528050667).

Almost surely, 2^21056101333 is an apocalyptic number.

It is an amenable number.

21056101333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21056101333 is an equidigital number, since it uses as much as digits as its factorization.

21056101333 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 25.

Adding to 21056101333 its reverse (33310165012), we get a palindrome (54366266345).

The spelling of 21056101333 in words is "twenty-one billion, fifty-six million, one hundred one thousand, three hundred thirty-three".