111222122122 has 16 divisors (see below), whose sum is σ = 169747322760. Its totient is φ = 54645345792.

The previous prime is 111222122101. The next prime is 111222122129. The reversal of 111222122122 is 221221222111.

It can be written as a sum of positive squares in 4 ways, for example, as 97274748321 + 13947373801 = 311889^2 + 118099^2 .

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 111222122122.

It is not an unprimeable number, because it can be changed into a prime (111222122129) 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, 1376703 + ... + 1455250.

Almost surely, 2^111222122122 is an apocalyptic number.

111222122122 is a deficient number, since it is larger than the sum of its proper divisors (58525200638).

111222122122 is a wasteful number, since it uses less digits than its factorization.

111222122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2832297.

The product of its digits is 128, while the sum is 19.

Adding to 111222122122 its reverse (221221222111), we get a palindrome (332443344233).

The spelling of 111222122122 in words is "one hundred eleven billion, two hundred twenty-two million, one hundred twenty-two thousand, one hundred twenty-two".