135140121 has 12 divisors (see below), whose sum is σ = 197136420. Its totient is φ = 89200800.

The previous prime is 135140119. The next prime is 135140143. The reversal of 135140121 is 121041531.

It can be written as a sum of positive squares in 2 ways, for example, as 110250000 + 24890121 = 10500^2 + 4989^2 .

It is not a de Polignac number, because 135140121 - 2¹ = 135140119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135140094 and 135140103.

It is not an unprimeable number, because it can be changed into a prime (135140221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73426 + ... + 75243.

It is an arithmetic number, because the mean of its divisors is an integer number (16428035).

Almost surely, 2^135140121 is an apocalyptic number.

It is an amenable number.

135140121 is a deficient number, since it is larger than the sum of its proper divisors (61996299).

135140121 is a wasteful number, since it uses less digits than its factorization.

135140121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148776 (or 148773 counting only the distinct ones).

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

The square root of 135140121 is about 11624.9783225604. The cubic root of 135140121 is about 513.1702067363.

Adding to 135140121 its reverse (121041531), we get a palindrome (256181652).

The spelling of 135140121 in words is "one hundred thirty-five million, one hundred forty thousand, one hundred twenty-one".