111212210112220 has 96 divisors (see below), whose sum is σ = 279549427046400. Its totient is φ = 36336494625024.

The previous prime is 111212210112121. The next prime is 111212210112221. The reversal of 111212210112220 is 22211012212111.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212210112221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63330760 + ... + 65063119.

It is an arithmetic number, because the mean of its divisors is an integer number (2911973198400).

Almost surely, 2^{111212210112220} is an apocalyptic number.

111212210112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111212210112220 is an abundant number, since it is smaller than the sum of its proper divisors (168337216934180).

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

111212210112220 is a wasteful number, since it uses less digits than its factorization.

111212210112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128394187 (or 128394185 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111212210112220 its reverse (22211012212111), we get a palindrome (133423222324331).

The spelling of 111212210112220 in words is "one hundred eleven trillion, two hundred twelve billion, two hundred ten million, one hundred twelve thousand, two hundred twenty".