135010021 has 2 divisors, whose sum is σ = 135010022. Its totient is φ = 135010020.

The previous prime is 135010013. The next prime is 135010037. The reversal of 135010021 is 120010531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130279396 + 4730625 = 11414^2 + 2175^2 .

It is a cyclic number.

It is not a de Polignac number, because 135010021 - 2³ = 135010013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135009983 and 135010010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135010081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67505010 + 67505011.

It is an arithmetic number, because the mean of its divisors is an integer number (67505011).

Almost surely, 2^135010021 is an apocalyptic number.

It is an amenable number.

135010021 is a deficient number, since it is larger than the sum of its proper divisors (1).

135010021 is an equidigital number, since it uses as much as digits as its factorization.

135010021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 135010021 is about 11619.3812657990. The cubic root of 135010021 is about 513.0054767771.

Adding to 135010021 its reverse (120010531), we get a palindrome (255020552).

The spelling of 135010021 in words is "one hundred thirty-five million, ten thousand, twenty-one".