111342661 has 2 divisors, whose sum is σ = 111342662. Its totient is φ = 111342660.

The previous prime is 111342659. The next prime is 111342761. The reversal of 111342661 is 166243111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98604900 + 12737761 = 9930^2 + 3569^2 .

It is a cyclic number.

It is not a de Polignac number, because 111342661 - 2¹ = 111342659 is a prime.

Together with 111342659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111342601) 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, 55671330 + 55671331.

It is an arithmetic number, because the mean of its divisors is an integer number (55671331).

Almost surely, 2^111342661 is an apocalyptic number.

It is an amenable number.

111342661 is a deficient number, since it is larger than the sum of its proper divisors (1).

111342661 is an equidigital number, since it uses as much as digits as its factorization.

111342661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 25.

The square root of 111342661 is about 10551.9031932633. The cubic root of 111342661 is about 481.0835777849.

Adding to 111342661 its reverse (166243111), we get a palindrome (277585772).

The spelling of 111342661 in words is "one hundred eleven million, three hundred forty-two thousand, six hundred sixty-one".