135336021 has 8 divisors (see below), whose sum is σ = 180941184. Its totient is φ = 89977440.

The previous prime is 135336013. The next prime is 135336043. The reversal of 135336021 is 120633531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135336021 - 2³ = 135336013 is a prime.

It is a super-2 number, since 2×135336021² = 36631677160224882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 135335982 and 135336000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135336521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60360 + ... + 62561.

It is an arithmetic number, because the mean of its divisors is an integer number (22617648).

Almost surely, 2^135336021 is an apocalyptic number.

It is an amenable number.

135336021 is a deficient number, since it is larger than the sum of its proper divisors (45605163).

135336021 is a wasteful number, since it uses less digits than its factorization.

135336021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123291.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 135336021 is about 11633.4010934034. The cubic root of 135336021 is about 513.4180519740.

Adding to 135336021 its reverse (120633531), we get a palindrome (255969552).

The spelling of 135336021 in words is "one hundred thirty-five million, three hundred thirty-six thousand, twenty-one".