111122220111210 has 768 divisors, whose sum is σ = 393099369062400. Its totient is φ = 21074589849600.

The previous prime is 111122220111173. The next prime is 111122220111241. The reversal of 111122220111210 is 12111022221111.

It is a happy number.

111122220111210 is a `hidden beast` number, since 1 + 1 + 1 + 122 + 220 + 111 + 210 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 1760264667 + ... + 1760327793.

It is an arithmetic number, because the mean of its divisors is an integer number (511848136800).

Almost surely, 2^{111122220111210} is an apocalyptic number.

111122220111210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 111122220111210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196549684531200).

111122220111210 is an abundant number, since it is smaller than the sum of its proper divisors (281977148951190).

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

111122220111210 is a wasteful number, since it uses less digits than its factorization.

111122220111210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63667 (or 63664 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111122220111210 its reverse (12111022221111), we get a palindrome (123233242332321).

The spelling of 111122220111210 in words is "one hundred eleven trillion, one hundred twenty-two billion, two hundred twenty million, one hundred eleven thousand, two hundred ten".