111385998361 has 6 divisors (see below), whose sum is σ = 122432543786. Its totient is φ = 101259998400.

The previous prime is 111385998349. The next prime is 111385998377. The reversal of 111385998361 is 163899583111.

It can be written as a sum of positive squares in only one way, i.e., 108385149961 + 3000848400 = 329219^2 + 54780^2 .

It is not a de Polignac number, because 111385998361 - 2⁷ = 111385998233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111385998301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 460272600 + ... + 460272841.

Almost surely, 2^111385998361 is an apocalyptic number.

111385998361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111385998361 is a deficient number, since it is larger than the sum of its proper divisors (11046545425).

111385998361 is an equidigital number, since it uses as much as digits as its factorization.

111385998361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920545463 (or 920545452 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 55.

The spelling of 111385998361 in words is "one hundred eleven billion, three hundred eighty-five million, nine hundred ninety-eight thousand, three hundred sixty-one".