135121101260121 has 24 divisors (see below), whose sum is σ = 198858505337856. Its totient is φ = 88380637431840.

The previous prime is 135121101260029. The next prime is 135121101260137. The reversal of 135121101260121 is 121062101121531.

135121101260121 is a `hidden beast` number, since 1 + 3 + 5 + 1 + 21 + 1 + 0 + 12 + 601 + 21 = 666.

It is not a de Polignac number, because 135121101260121 - 2¹⁰ = 135121101259097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135121101260221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107627706 + ... + 108875916.

It is an arithmetic number, because the mean of its divisors is an integer number (8285771055744).

Almost surely, 2^{135121101260121} is an apocalyptic number.

It is an amenable number.

135121101260121 is a deficient number, since it is larger than the sum of its proper divisors (63737404077735).

135121101260121 is a wasteful number, since it uses less digits than its factorization.

135121101260121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475213 (or 1475210 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

Adding to 135121101260121 its reverse (121062101121531), we get a palindrome (256183202381652).

The spelling of 135121101260121 in words is "one hundred thirty-five trillion, one hundred twenty-one billion, one hundred one million, two hundred sixty thousand, one hundred twenty-one".