111201111220 has 24 divisors (see below), whose sum is σ = 241055313408. Its totient is φ = 43045591200.

The previous prime is 111201111211. The next prime is 111201111239. The reversal of 111201111220 is 22111102111.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 111201111220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89677696 + ... + 89678935.

It is an arithmetic number, because the mean of its divisors is an integer number (10043971392).

Almost surely, 2^111201111220 is an apocalyptic number.

111201111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111201111220 is an abundant number, since it is smaller than the sum of its proper divisors (129854202188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111201111220 is a wasteful number, since it uses less digits than its factorization.

111201111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179356671 (or 179356669 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111201111220 its reverse (22111102111), we get a palindrome (133312213331).

The spelling of 111201111220 in words is "one hundred eleven billion, two hundred one million, one hundred eleven thousand, two hundred twenty".