117881521311 has 4 divisors (see below), whose sum is σ = 157175361752. Its totient is φ = 78587680872.

The previous prime is 117881521243. The next prime is 117881521313. The reversal of 117881521311 is 113125188711.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 117881521311 - 2¹⁰ = 117881520287 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 117881521311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117881521313) 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 3 ways as a sum of consecutive naturals, for example, 19646920216 + ... + 19646920221.

It is an arithmetic number, because the mean of its divisors is an integer number (39293840438).

Almost surely, 2^117881521311 is an apocalyptic number.

117881521311 is a deficient number, since it is larger than the sum of its proper divisors (39293840441).

117881521311 is an equidigital number, since it uses as much as digits as its factorization.

117881521311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39293840440.

The product of its digits is 13440, while the sum is 39.

The spelling of 117881521311 in words is "one hundred seventeen billion, eight hundred eighty-one million, five hundred twenty-one thousand, three hundred eleven".