111222143 has 32 divisors (see below), whose sum is σ = 129470400. Its totient is φ = 94887936.

The previous prime is 111222127. The next prime is 111222151. The reversal of 111222143 is 341222111.

It is a cyclic number.

It is not a de Polignac number, because 111222143 - 2⁴ = 111222127 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1249643 + ... + 1249731.

It is an arithmetic number, because the mean of its divisors is an integer number (4045950).

Almost surely, 2^111222143 is an apocalyptic number.

111222143 is a deficient number, since it is larger than the sum of its proper divisors (18248257).

111222143 is a wasteful number, since it uses less digits than its factorization.

111222143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251.

The product of its digits is 96, while the sum is 17.

The square root of 111222143 is about 10546.1909237411. The cubic root of 111222143 is about 480.9099391523.

Adding to 111222143 its reverse (341222111), we get a palindrome (452444254).

The spelling of 111222143 in words is "one hundred eleven million, two hundred twenty-two thousand, one hundred forty-three".