111122222999 has 6 divisors (see below), whose sum is σ = 113536832184. Its totient is φ = 108757918220.

The previous prime is 111122222987. The next prime is 111122223053. The reversal of 111122222999 is 999222221111.

It is a de Polignac number, because none of the positive numbers 2^k-111122222999 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111122221999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25149947 + ... + 25154364.

It is an arithmetic number, because the mean of its divisors is an integer number (18922805364).

Almost surely, 2^111122222999 is an apocalyptic number.

111122222999 is a deficient number, since it is larger than the sum of its proper divisors (2414609185).

111122222999 is an frugal number, since it uses more digits than its factorization.

111122222999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50304405 (or 50304358 counting only the distinct ones).

The product of its digits is 23328, while the sum is 41.

The spelling of 111122222999 in words is "one hundred eleven billion, one hundred twenty-two million, two hundred twenty-two thousand, nine hundred ninety-nine".