113611111 has 2 divisors, whose sum is σ = 113611112. Its totient is φ = 113611110.

The previous prime is 113611109. The next prime is 113611139. The reversal of 113611111 is 111116311.

It is a weak prime.

It is an emirp because it is prime and its reverse (111116311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 113611111 - 2¹ = 113611109 is a prime.

Together with 113611109, it forms a pair of twin primes.

113611111 is a modest number, since divided by 11111 gives 1136 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113611151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56805555 + 56805556.

It is an arithmetic number, because the mean of its divisors is an integer number (56805556).

Almost surely, 2^113611111 is an apocalyptic number.

113611111 is a deficient number, since it is larger than the sum of its proper divisors (1).

113611111 is an equidigital number, since it uses as much as digits as its factorization.

113611111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18, while the sum is 16.

The square root of 113611111 is about 10658.8512983342. The cubic root of 113611111 is about 484.3287713966.

Adding to 113611111 its reverse (111116311), we get a palindrome (224727422).

The spelling of 113611111 in words is "one hundred thirteen million, six hundred eleven thousand, one hundred eleven".