111120388991 has 4 divisors (see below), whose sum is σ = 111181079184. Its totient is φ = 111059698800.

The previous prime is 111120388927. The next prime is 111120389047. The reversal of 111120388991 is 199883021111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199883021111 = 157217 ⋅1271383.

It is a cyclic number.

It is not a de Polignac number, because 111120388991 - 2⁶ = 111120388927 is a prime.

It is a super-2 number, since 2×111120388991² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111120388901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30342350 + ... + 30346011.

It is an arithmetic number, because the mean of its divisors is an integer number (27795269796).

Almost surely, 2^111120388991 is an apocalyptic number.

111120388991 is a deficient number, since it is larger than the sum of its proper divisors (60690193).

111120388991 is an equidigital number, since it uses as much as digits as its factorization.

111120388991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60690192.

The product of its (nonzero) digits is 31104, while the sum is 44.

The spelling of 111120388991 in words is "one hundred eleven billion, one hundred twenty million, three hundred eighty-eight thousand, nine hundred ninety-one".