135104121 has 6 divisors (see below), whose sum is σ = 195150410. Its totient is φ = 90069408.

The previous prime is 135104113. The next prime is 135104147. The reversal of 135104121 is 121401531.

It can be written as a sum of positive squares in only one way, i.e., 133749225 + 1354896 = 11565^2 + 1164^2 .

It is not a de Polignac number, because 135104121 - 2³ = 135104113 is a prime.

It is a super-2 number, since 2×135104121² = 36506247022365282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135104094 and 135104103.

It is not an unprimeable number, because it can be changed into a prime (135104191) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7505776 + ... + 7505793.

Almost surely, 2^135104121 is an apocalyptic number.

It is an amenable number.

135104121 is a deficient number, since it is larger than the sum of its proper divisors (60046289).

135104121 is a wasteful number, since it uses less digits than its factorization.

135104121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15011575 (or 15011572 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 135104121 is about 11623.4298294436. The cubic root of 135104121 is about 513.1246348563.

Adding to 135104121 its reverse (121401531), we get a palindrome (256505652).

The spelling of 135104121 in words is "one hundred thirty-five million, one hundred four thousand, one hundred twenty-one".