21003030133 has 2 divisors, whose sum is σ = 21003030134. Its totient is φ = 21003030132.

The previous prime is 21003030119. The next prime is 21003030143. The reversal of 21003030133 is 33103030012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18729838449 + 2273191684 = 136857^2 + 47678^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21003030133 is a prime.

It is a super-3 number, since 3×21003030133³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21003030143) 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, 10501515066 + 10501515067.

It is an arithmetic number, because the mean of its divisors is an integer number (10501515067).

Almost surely, 2^21003030133 is an apocalyptic number.

It is an amenable number.

21003030133 is a deficient number, since it is larger than the sum of its proper divisors (1).

21003030133 is an equidigital number, since it uses as much as digits as its factorization.

21003030133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 16.

Adding to 21003030133 its reverse (33103030012), we get a palindrome (54106060145).

The spelling of 21003030133 in words is "twenty-one billion, three million, thirty thousand, one hundred thirty-three".