111121671111 has 8 divisors (see below), whose sum is σ = 161631521664. Its totient is φ = 67346467320.

The previous prime is 111121671107. The next prime is 111121671119. The reversal of 111121671111 is 111176121111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111121671111 - 2² = 111121671107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121671119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1683661651 + ... + 1683661716.

It is an arithmetic number, because the mean of its divisors is an integer number (20203940208).

Almost surely, 2^111121671111 is an apocalyptic number.

111121671111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111121671111 is a deficient number, since it is larger than the sum of its proper divisors (50509850553).

111121671111 is a wasteful number, since it uses less digits than its factorization.

111121671111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3367323381.

The product of its digits is 84, while the sum is 24.

Adding to 111121671111 its reverse (111176121111), we get a palindrome (222297792222).

The spelling of 111121671111 in words is "one hundred eleven billion, one hundred twenty-one million, six hundred seventy-one thousand, one hundred eleven".