11111222789 has 16 divisors (see below), whose sum is σ = 11821168512. Its totient is φ = 10420458048.

The previous prime is 11111222783. The next prime is 11111222791. The reversal of 11111222789 is 98722211111.

It is not a de Polignac number, because 11111222789 - 2²⁰ = 11110174213 is a prime.

It is a Duffinian number.

It is a Curzon 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 (11111222783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2841974 + ... + 2845880.

It is an arithmetic number, because the mean of its divisors is an integer number (738823032).

Almost surely, 2^11111222789 is an apocalyptic number.

It is an amenable number.

11111222789 is a deficient number, since it is larger than the sum of its proper divisors (709945723).

11111222789 is a wasteful number, since it uses less digits than its factorization.

11111222789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6316.

The product of its digits is 4032, while the sum is 35.

The spelling of 11111222789 in words is "eleven billion, one hundred eleven million, two hundred twenty-two thousand, seven hundred eighty-nine".