111216377 has 2 divisors, whose sum is σ = 111216378. Its totient is φ = 111216376.

The previous prime is 111216373. The next prime is 111216379. The reversal of 111216377 is 773612111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101828281 + 9388096 = 10091^2 + 3064^2 .

It is an emirp because it is prime and its reverse (773612111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111216377 - 2² = 111216373 is a prime.

It is a super-2 number, since 2×111216377² = 24738165026012258, which contains 22 as substring.

Together with 111216379, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111216373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55608188 + 55608189.

It is an arithmetic number, because the mean of its divisors is an integer number (55608189).

Almost surely, 2^111216377 is an apocalyptic number.

It is an amenable number.

111216377 is a deficient number, since it is larger than the sum of its proper divisors (1).

111216377 is an equidigital number, since it uses as much as digits as its factorization.

111216377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1764, while the sum is 29.

The square root of 111216377 is about 10545.9175513561. The cubic root of 111216377 is about 480.9016285331.

Adding to 111216377 its reverse (773612111), we get a palindrome (884828488).

The spelling of 111216377 in words is "one hundred eleven million, two hundred sixteen thousand, three hundred seventy-seven".