111212220330 has 48 divisors (see below), whose sum is σ = 289300588200. Its totient is φ = 29641329024.

The previous prime is 111212220323. The next prime is 111212220331. The reversal of 111212220330 is 33022212111.

111212220330 is a `hidden beast` number, since 1 + 112 + 1 + 2 + 220 + 330 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 70628909121 + 40583311209 = 265761^2 + 201453^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111212220331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141597 + ... + 492416.

Almost surely, 2^111212220330 is an apocalyptic number.

111212220330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111212220330 is an abundant number, since it is smaller than the sum of its proper divisors (178088367870).

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

111212220330 is a wasteful number, since it uses less digits than its factorization.

111212220330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635975 (or 635972 counting only the distinct ones).

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

Adding to 111212220330 its reverse (33022212111), we get a palindrome (144234432441).

The spelling of 111212220330 in words is "one hundred eleven billion, two hundred twelve million, two hundred twenty thousand, three hundred thirty".