111612101 has 2 divisors, whose sum is σ = 111612102. Its totient is φ = 111612100.

The previous prime is 111612043. The next prime is 111612143. The reversal of 111612101 is 101216111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99002500 + 12609601 = 9950^2 + 3551^2 .

It is a cyclic number.

It is not a de Polignac number, because 111612101 - 2¹⁴ = 111595717 is a prime.

It is a super-2 number, since 2×111612101² = 24914522179268402, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111612181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55806050 + 55806051.

It is an arithmetic number, because the mean of its divisors is an integer number (55806051).

Almost surely, 2^111612101 is an apocalyptic number.

It is an amenable number.

111612101 is a deficient number, since it is larger than the sum of its proper divisors (1).

111612101 is an equidigital number, since it uses as much as digits as its factorization.

111612101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 14.

The square root of 111612101 is about 10564.6628436501. The cubic root of 111612101 is about 481.4713259589.

Adding to 111612101 its reverse (101216111), we get a palindrome (212828212).

The spelling of 111612101 in words is "one hundred eleven million, six hundred twelve thousand, one hundred one".