117125521281 has 6 divisors (see below), whose sum is σ = 169181308530. Its totient is φ = 78083680848.

The previous prime is 117125521267. The next prime is 117125521283. The reversal of 117125521281 is 182125521711.

117125521281 is a `hidden beast` number, since 1 + 1 + 7 + 12 + 552 + 12 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 71404390656 + 45721130625 = 267216^2 + 213825^2 .

It is a de Polignac number, because none of the positive numbers 2^k-117125521281 is a prime.

It is a super-2 number, since 2×117125521281² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (117125521283) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 6506973396 + ... + 6506973413.

It is an arithmetic number, because the mean of its divisors is an integer number (28196884755).

Almost surely, 2^117125521281 is an apocalyptic number.

It is an amenable number.

117125521281 is a deficient number, since it is larger than the sum of its proper divisors (52055787249).

117125521281 is a wasteful number, since it uses less digits than its factorization.

117125521281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13013946815 (or 13013946812 counting only the distinct ones).

The product of its digits is 11200, while the sum is 36.

The spelling of 117125521281 in words is "one hundred seventeen billion, one hundred twenty-five million, five hundred twenty-one thousand, two hundred eighty-one".