121935525539121 has 16 divisors (see below), whose sum is σ = 206451683452800. Its totient is φ = 69677443165104.

The previous prime is 121935525539099. The next prime is 121935525539129.

121935525539121 is a `hidden beast` number, since 1 + 2 + 1 + 9 + 3 + 5 + 525 + 5 + 3 + 91 + 21 = 666.

121935525539121 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 121935525539121 - 2⁴² = 117537479028017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121935525539129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322580755206 + ... + 322580755583.

It is an arithmetic number, because the mean of its divisors is an integer number (12903230215800).

Almost surely, 2^{121935525539121} is an apocalyptic number.

It is an amenable number.

121935525539121 is a deficient number, since it is larger than the sum of its proper divisors (84516157913679).

121935525539121 is an equidigital number, since it uses as much as digits as its factorization.

121935525539121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645161510805 (or 645161510799 counting only the distinct ones).

The product of its digits is 3645000, while the sum is 54.

The spelling of 121935525539121 in words is "one hundred twenty-one trillion, nine hundred thirty-five billion, five hundred twenty-five million, five hundred thirty-nine thousand, one hundred twenty-one".