111312101 has 2 divisors, whose sum is σ = 111312102. Its totient is φ = 111312100.

The previous prime is 111312077. The next prime is 111312109. The reversal of 111312101 is 101213111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69722500 + 41589601 = 8350^2 + 6449^2 .

It is an emirp because it is prime and its reverse (101213111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111312101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111312109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55656050 + 55656051.

It is an arithmetic number, because the mean of its divisors is an integer number (55656051).

Almost surely, 2^111312101 is an apocalyptic number.

It is an amenable number.

111312101 is a deficient number, since it is larger than the sum of its proper divisors (1).

111312101 is an equidigital number, since it uses as much as digits as its factorization.

111312101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 111312101 is about 10550.4550138845. The cubic root of 111312101 is about 481.0395597381.

Adding to 111312101 its reverse (101213111), we get a palindrome (212525212).

The spelling of 111312101 in words is "one hundred eleven million, three hundred twelve thousand, one hundred one".