30133021 has 2 divisors, whose sum is σ = 30133022. Its totient is φ = 30133020.

The previous prime is 30133003. The next prime is 30133057. The reversal of 30133021 is 12033103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26152996 + 3980025 = 5114^2 + 1995^2 .

It is a cyclic number.

It is not a de Polignac number, because 30133021 - 2¹¹ = 30130973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30132992 and 30133010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30133421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15066510 + 15066511.

It is an arithmetic number, because the mean of its divisors is an integer number (15066511).

Almost surely, 2^30133021 is an apocalyptic number.

It is an amenable number.

30133021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30133021 is an equidigital number, since it uses as much as digits as its factorization.

30133021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 30133021 is about 5489.3552444709. The cubic root of 30133021 is about 311.1818258992.

Adding to 30133021 its reverse (12033103), we get a palindrome (42166124).

The spelling of 30133021 in words is "thirty million, one hundred thirty-three thousand, twenty-one".