111101143 has 4 divisors (see below), whose sum is σ = 111437128. Its totient is φ = 110765160.

The previous prime is 111101129. The next prime is 111101153. The reversal of 111101143 is 341101111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111101143 - 2⁹ = 111100631 is a prime.

It is a super-4 number, since 4×111101143⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111101153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167496 + ... + 168157.

It is an arithmetic number, because the mean of its divisors is an integer number (27859282).

Almost surely, 2^111101143 is an apocalyptic number.

111101143 is a deficient number, since it is larger than the sum of its proper divisors (335985).

111101143 is an equidigital number, since it uses as much as digits as its factorization.

111101143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335984.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 111101143 is about 10540.4526942632. The cubic root of 111101143 is about 480.7354798352.

Adding to 111101143 its reverse (341101111), we get a palindrome (452202254).

The spelling of 111101143 in words is "one hundred eleven million, one hundred one thousand, one hundred forty-three".