84242111 has 2 divisors, whose sum is σ = 84242112. Its totient is φ = 84242110.

The previous prime is 84242107. The next prime is 84242113. The reversal of 84242111 is 11124248.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84242111 - 2² = 84242107 is a prime.

Together with 84242113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84242113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42121055 + 42121056.

It is an arithmetic number, because the mean of its divisors is an integer number (42121056).

Almost surely, 2^84242111 is an apocalyptic number.

84242111 is a deficient number, since it is larger than the sum of its proper divisors (1).

84242111 is an equidigital number, since it uses as much as digits as its factorization.

84242111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 512, while the sum is 23.

The square root of 84242111 is about 9178.3501240691. The cubic root of 84242111 is about 438.3722761580.

Adding to 84242111 its reverse (11124248), we get a palindrome (95366359).

The spelling of 84242111 in words is "eighty-four million, two hundred forty-two thousand, one hundred eleven".