111612143 has 2 divisors, whose sum is σ = 111612144. Its totient is φ = 111612142.

The previous prime is 111612101. The next prime is 111612173. The reversal of 111612143 is 341216111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111612143 - 2²² = 107417839 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111612173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55806071 + 55806072.

It is an arithmetic number, because the mean of its divisors is an integer number (55806072).

Almost surely, 2^111612143 is an apocalyptic number.

111612143 is a deficient number, since it is larger than the sum of its proper divisors (1).

111612143 is an equidigital number, since it uses as much as digits as its factorization.

111612143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 20.

The square root of 111612143 is about 10564.6648314085. The cubic root of 111612143 is about 481.4713863519.

Adding to 111612143 its reverse (341216111), we get a palindrome (452828254).

The spelling of 111612143 in words is "one hundred eleven million, six hundred twelve thousand, one hundred forty-three".