111391918652170 has 32 divisors (see below), whose sum is σ = 215932057741008. Its totient is φ = 41128731859968.

The previous prime is 111391918652143. The next prime is 111391918652239. The reversal of 111391918652170 is 71256819193111.

It is a Cunningham number, because it is equal to 10554237²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 28335617180641 + 83056301471529 = 5323121^2 + 9113523^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2952802 + ... + 15215218.

Almost surely, 2^{111391918652170} is an apocalyptic number.

111391918652170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111391918652170 is a deficient number, since it is larger than the sum of its proper divisors (104540139088838).

111391918652170 is a wasteful number, since it uses less digits than its factorization.

111391918652170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12332314.

The product of its (nonzero) digits is 816480, while the sum is 55.

The spelling of 111391918652170 in words is "one hundred eleven trillion, three hundred ninety-one billion, nine hundred eighteen million, six hundred fifty-two thousand, one hundred seventy".