21225030133 has 2 divisors, whose sum is σ = 21225030134. Its totient is φ = 21225030132.

The previous prime is 21225030089. The next prime is 21225030143. The reversal of 21225030133 is 33103052212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16749018724 + 4476011409 = 129418^2 + 66903^2 .

It is a cyclic number.

It is not a de Polignac number, because 21225030133 - 2¹⁷ = 21224899061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21225030143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10612515066 + 10612515067.

It is an arithmetic number, because the mean of its divisors is an integer number (10612515067).

Almost surely, 2^21225030133 is an apocalyptic number.

It is an amenable number.

21225030133 is a deficient number, since it is larger than the sum of its proper divisors (1).

21225030133 is an equidigital number, since it uses as much as digits as its factorization.

21225030133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 22.

Adding to 21225030133 its reverse (33103052212), we get a palindrome (54328082345).

The spelling of 21225030133 in words is "twenty-one billion, two hundred twenty-five million, thirty thousand, one hundred thirty-three".