111720355 has 4 divisors (see below), whose sum is σ = 134064432. Its totient is φ = 89376280.

The previous prime is 111720319. The next prime is 111720397. The reversal of 111720355 is 553027111.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 111720355 - 2⁷ = 111720227 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11172031 + ... + 11172040.

It is an arithmetic number, because the mean of its divisors is an integer number (33516108).

Almost surely, 2^111720355 is an apocalyptic number.

111720355 is a deficient number, since it is larger than the sum of its proper divisors (22344077).

111720355 is an equidigital number, since it uses as much as digits as its factorization.

111720355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22344076.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 111720355 is about 10569.7850025438. The cubic root of 111720355 is about 481.6269373861.

Adding to 111720355 its reverse (553027111), we get a palindrome (664747466).

The spelling of 111720355 in words is "one hundred eleven million, seven hundred twenty thousand, three hundred fifty-five".