111123456789 has 8 divisors (see below), whose sum is σ = 154606548672. Its totient is φ = 70861334720.

The previous prime is 111123456781. The next prime is 111123456911. The reversal of 111123456789 is 987654321111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111123456789 - 2³ = 111123456781 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111123456781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 805242372 + ... + 805242509.

It is an arithmetic number, because the mean of its divisors is an integer number (19325818584).

Almost surely, 2^111123456789 is an apocalyptic number.

It is an amenable number.

111123456789 is a deficient number, since it is larger than the sum of its proper divisors (43483091883).

111123456789 is a wasteful number, since it uses less digits than its factorization.

111123456789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610484907.

The product of its digits is 362880, while the sum is 48.

The spelling of 111123456789 in words is "one hundred eleven billion, one hundred twenty-three million, four hundred fifty-six thousand, seven hundred eighty-nine".