111206143 has 2 divisors, whose sum is σ = 111206144. Its totient is φ = 111206142.

The previous prime is 111206119. The next prime is 111206149. The reversal of 111206143 is 341602111.

It is a strong prime.

It is an emirp because it is prime and its reverse (341602111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111206143 - 2⁹ = 111205631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111206143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111206149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55603071 + 55603072.

It is an arithmetic number, because the mean of its divisors is an integer number (55603072).

Almost surely, 2^111206143 is an apocalyptic number.

111206143 is a deficient number, since it is larger than the sum of its proper divisors (1).

111206143 is an equidigital number, since it uses as much as digits as its factorization.

111206143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 111206143 is about 10545.4323287384. The cubic root of 111206143 is about 480.8868774135.

Adding to 111206143 its reverse (341602111), we get a palindrome (452808254).

The spelling of 111206143 in words is "one hundred eleven million, two hundred six thousand, one hundred forty-three".