134236021 has 2 divisors, whose sum is σ = 134236022. Its totient is φ = 134236020.

The previous prime is 134235991. The next prime is 134236031. The reversal of 134236021 is 120632431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134235396 + 625 = 11586^2 + 25^2 .

It is a cyclic number.

It is not a de Polignac number, because 134236021 - 2⁹ = 134235509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 134235983 and 134236001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134236031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67118010 + 67118011.

It is an arithmetic number, because the mean of its divisors is an integer number (67118011).

Almost surely, 2^134236021 is an apocalyptic number.

It is an amenable number.

134236021 is a deficient number, since it is larger than the sum of its proper divisors (1).

134236021 is an equidigital number, since it uses as much as digits as its factorization.

134236021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 134236021 is about 11586.0269721764. The cubic root of 134236021 is about 512.0232596957.

Adding to 134236021 its reverse (120632431), we get a palindrome (254868452).

The spelling of 134236021 in words is "one hundred thirty-four million, two hundred thirty-six thousand, twenty-one".