21120300133 has 2 divisors, whose sum is σ = 21120300134. Its totient is φ = 21120300132.

The previous prime is 21120300107. The next prime is 21120300197. The reversal of 21120300133 is 33100302112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21018330529 + 101969604 = 144977^2 + 10098^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21120300133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21120300233) 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, 10560150066 + 10560150067.

It is an arithmetic number, because the mean of its divisors is an integer number (10560150067).

Almost surely, 2^21120300133 is an apocalyptic number.

It is an amenable number.

21120300133 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120300133 is an equidigital number, since it uses as much as digits as its factorization.

21120300133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21120300133 its reverse (33100302112), we get a palindrome (54220602245).

The spelling of 21120300133 in words is "twenty-one billion, one hundred twenty million, three hundred thousand, one hundred thirty-three".