111221212222 has 8 divisors (see below), whose sum is σ = 166833877896. Its totient is φ = 55609919592.

The previous prime is 111221212187. The next prime is 111221212229. The reversal of 111221212222 is 222212122111.

It is a sphenic number, since it is the product of 3 distinct primes.

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 111221212222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221212229) 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, 108693 + ... + 484000.

It is an arithmetic number, because the mean of its divisors is an integer number (20854234737).

Almost surely, 2^111221212222 is an apocalyptic number.

111221212222 is a deficient number, since it is larger than the sum of its proper divisors (55612665674).

111221212222 is an equidigital number, since it uses as much as digits as its factorization.

111221212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686522.

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

Adding to 111221212222 its reverse (222212122111), we get a palindrome (333433334333).

The spelling of 111221212222 in words is "one hundred eleven billion, two hundred twenty-one million, two hundred twelve thousand, two hundred twenty-two".