121517539060 has 24 divisors (see below), whose sum is σ = 255237866856. Its totient is φ = 48597294720.

The previous prime is 121517539001. The next prime is 121517539123. The reversal of 121517539060 is 60935715121.

It can be written as a sum of positive squares in 4 ways, for example, as 73417153936 + 48100385124 = 270956^2 + 219318^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504627 + ... + 705466.

It is an arithmetic number, because the mean of its divisors is an integer number (10634911119).

Almost surely, 2^121517539060 is an apocalyptic number.

121517539060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121517539060 is an abundant number, since it is smaller than the sum of its proper divisors (133720327796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121517539060 is a wasteful number, since it uses less digits than its factorization.

121517539060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215123 (or 1215121 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 40.

The spelling of 121517539060 in words is "one hundred twenty-one billion, five hundred seventeen million, five hundred thirty-nine thousand, sixty".