135403322121 has 12 divisors (see below), whose sum is σ = 195622481860. Its totient is φ = 90250463520.

The previous prime is 135403322113. The next prime is 135403322143. The reversal of 135403322121 is 121223304531.

135403322121 is a `hidden beast` number, since 1 + 35 + 403 + 3 + 221 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 87950799225 + 47452522896 = 296565^2 + 217836^2 .

It is not a de Polignac number, because 135403322121 - 2³ = 135403322113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135403322111) 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, 1488190 + ... + 1576551.

Almost surely, 2^135403322121 is an apocalyptic number.

It is an amenable number.

135403322121 is a deficient number, since it is larger than the sum of its proper divisors (60219159739).

135403322121 is a wasteful number, since it uses less digits than its factorization.

135403322121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3069656 (or 3069653 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 135403322121 its reverse (121223304531), we get a palindrome (256626626652).

The spelling of 135403322121 in words is "one hundred thirty-five billion, four hundred three million, three hundred twenty-two thousand, one hundred twenty-one".