111011660111 has 8 divisors (see below), whose sum is σ = 121274446800. Its totient is φ = 100777343040.

The previous prime is 111011660087. The next prime is 111011660131. The reversal of 111011660111 is 111066110111.

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

It is not a de Polignac number, because 111011660111 - 2¹⁸ = 111011397967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111011660131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7109246 + ... + 7124843.

It is an arithmetic number, because the mean of its divisors is an integer number (15159305850).

Almost surely, 2^111011660111 is an apocalyptic number.

111011660111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111011660111 is a deficient number, since it is larger than the sum of its proper divisors (10262786689).

111011660111 is a wasteful number, since it uses less digits than its factorization.

111011660111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14234809.

The product of its (nonzero) digits is 36, while the sum is 20.

Adding to 111011660111 its reverse (111066110111), we get a palindrome (222077770222).

The spelling of 111011660111 in words is "one hundred eleven billion, eleven million, six hundred sixty thousand, one hundred eleven".