11111233456789 has 4 divisors (see below), whose sum is σ = 11123041357260. Its totient is φ = 11099425556320.

The previous prime is 11111233456769. The next prime is 11111233456861. The reversal of 11111233456789 is 98765433211111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6404655070564 + 4706578386225 = 2530742^2 + 2169465^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111233456789 - 2³⁹ = 10561477642901 is a prime.

It is a Duffinian number.

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 (11111233456769) 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, 5903948824 + ... + 5903950705.

It is an arithmetic number, because the mean of its divisors is an integer number (2780760339315).

Almost surely, 2^{11111233456789} is an apocalyptic number.

It is an amenable number.

11111233456789 is a deficient number, since it is larger than the sum of its proper divisors (11807900471).

11111233456789 is an equidigital number, since it uses as much as digits as its factorization.

11111233456789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11807900470.

The product of its digits is 1088640, while the sum is 52.

The spelling of 11111233456789 in words is "eleven trillion, one hundred eleven billion, two hundred thirty-three million, four hundred fifty-six thousand, seven hundred eighty-nine".