111212330220 has 36 divisors (see below), whose sum is σ = 337344068880. Its totient is φ = 29656621344.

The previous prime is 111212330197. The next prime is 111212330221. The reversal of 111212330220 is 22033212111.

111212330220 is a `hidden beast` number, since 1 + 112 + 1 + 2 + 330 + 220 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 111212330193 and 111212330202.

It is not an unprimeable number, because it can be changed into a prime (111212330221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 308922960 + ... + 308923319.

It is an arithmetic number, because the mean of its divisors is an integer number (9370668580).

Almost surely, 2^111212330220 is an apocalyptic number.

111212330220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111212330220 is an abundant number, since it is smaller than the sum of its proper divisors (226131738660).

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

111212330220 is a wasteful number, since it uses less digits than its factorization.

111212330220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617846294 (or 617846289 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 111212330220 its reverse (22033212111), we get a palindrome (133245542331).

The spelling of 111212330220 in words is "one hundred eleven billion, two hundred twelve million, three hundred thirty thousand, two hundred twenty".