111220211222 has 16 divisors (see below), whose sum is σ = 176672301120. Its totient is φ = 52330497408.

The previous prime is 111220211209. The next prime is 111220211227. The reversal of 111220211222 is 222112022111.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 111220211222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111220211227) 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, 46397 + ... + 473912.

It is an arithmetic number, because the mean of its divisors is an integer number (11042018820).

Almost surely, 2^111220211222 is an apocalyptic number.

111220211222 is a deficient number, since it is larger than the sum of its proper divisors (65452089898).

111220211222 is a wasteful number, since it uses less digits than its factorization.

111220211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526615.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 111220211222 its reverse (222112022111), we get a palindrome (333332233333).

The spelling of 111220211222 in words is "one hundred eleven billion, two hundred twenty million, two hundred eleven thousand, two hundred twenty-two".