111216783628991 has 8 divisors (see below), whose sum is σ = 113053844389968. Its totient is φ = 109380169152000.

The previous prime is 111216783628931. The next prime is 111216783628999. The reversal of 111216783628991 is 199826387612111.

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 111216783628991 - 2³⁰ = 111215709887167 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 (111216783628999) 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, 111068450 + ... + 112065311.

It is an arithmetic number, because the mean of its divisors is an integer number (14131730548746).

Almost surely, 2^{111216783628991} is an apocalyptic number.

111216783628991 is a deficient number, since it is larger than the sum of its proper divisors (1837060760977).

111216783628991 is an equidigital number, since it uses as much as digits as its factorization.

111216783628991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223141993.

The product of its digits is 15676416, while the sum is 65.

The spelling of 111216783628991 in words is "one hundred eleven trillion, two hundred sixteen billion, seven hundred eighty-three million, six hundred twenty-eight thousand, nine hundred ninety-one".