111666232143 has 12 divisors (see below), whose sum is σ = 163567439568. Its totient is φ = 73395645120.

The previous prime is 111666232091. The next prime is 111666232163. The reversal of 111666232143 is 341232666111.

It is not a de Polignac number, because 111666232143 - 2¹⁰ = 111666231119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111666232098 and 111666232107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111666232163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87375130 + ... + 87376407.

It is an arithmetic number, because the mean of its divisors is an integer number (13630619964).

Almost surely, 2^111666232143 is an apocalyptic number.

111666232143 is a deficient number, since it is larger than the sum of its proper divisors (51901207425).

111666232143 is a wasteful number, since it uses less digits than its factorization.

111666232143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174751614 (or 174751611 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

Adding to 111666232143 its reverse (341232666111), we get a palindrome (452898898254).

The spelling of 111666232143 in words is "one hundred eleven billion, six hundred sixty-six million, two hundred thirty-two thousand, one hundred forty-three".