111234456789 has 4 divisors (see below), whose sum is σ = 148312609056. Its totient is φ = 74156304524.

The previous prime is 111234456701. The next prime is 111234456803. The reversal of 111234456789 is 987654432111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111234456789 - 2²⁸ = 110966021333 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 (111234452789) 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, 18539076129 + ... + 18539076134.

It is an arithmetic number, because the mean of its divisors is an integer number (37078152264).

Almost surely, 2^111234456789 is an apocalyptic number.

It is an amenable number.

111234456789 is a deficient number, since it is larger than the sum of its proper divisors (37078152267).

111234456789 is an equidigital number, since it uses as much as digits as its factorization.

111234456789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37078152266.

The product of its digits is 1451520, while the sum is 51.

The spelling of 111234456789 in words is "one hundred eleven billion, two hundred thirty-four million, four hundred fifty-six thousand, seven hundred eighty-nine".