133046021 has 2 divisors, whose sum is σ = 133046022. Its totient is φ = 133046020.

The previous prime is 133045981. The next prime is 133046051. The reversal of 133046021 is 120640331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130530625 + 2515396 = 11425^2 + 1586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133046021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133045984 and 133046002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133046051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66523010 + 66523011.

It is an arithmetic number, because the mean of its divisors is an integer number (66523011).

Almost surely, 2^133046021 is an apocalyptic number.

It is an amenable number.

133046021 is a deficient number, since it is larger than the sum of its proper divisors (1).

133046021 is an equidigital number, since it uses as much as digits as its factorization.

133046021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 133046021 is about 11534.5576854945. The cubic root of 133046021 is about 510.5057407879.

Adding to 133046021 its reverse (120640331), we get a palindrome (253686352).

The spelling of 133046021 in words is "one hundred thirty-three million, forty-six thousand, twenty-one".