111998866111 has 8 divisors (see below), whose sum is σ = 122800789584. Its totient is φ = 101300310720.

The previous prime is 111998866087. The next prime is 111998866121. The reversal of 111998866111 is 111668899111.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 111998866111 - 2⁵ = 111998866079 is a prime.

111998866111 is a strobogrammatic number because it is the same when read upside-down.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111998866121) 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, 25839750 + ... + 25844083.

It is an arithmetic number, because the mean of its divisors is an integer number (15350098698).

Almost surely, 2^111998866111 is an apocalyptic number.

111998866111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111998866111 is a deficient number, since it is larger than the sum of its proper divisors (10801923473).

111998866111 is a wasteful number, since it uses less digits than its factorization.

111998866111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51684041.

The product of its digits is 186624, while the sum is 52.

The spelling of 111998866111 in words is "one hundred eleven billion, nine hundred ninety-eight million, eight hundred sixty-six thousand, one hundred eleven".