111012220221210 has 192 divisors, whose sum is σ = 360261078637824. Its totient is φ = 23041289779200.

The previous prime is 111012220221181. The next prime is 111012220221311. The reversal of 111012220221210 is 12122022210111.

111012220221210 is a `hidden beast` number, since 1 + 1 + 1 + 0 + 12 + 220 + 221 + 210 = 666.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2986089 + ... + 15196748.

It is an arithmetic number, because the mean of its divisors is an integer number (1876359784572).

Almost surely, 2^{111012220221210} is an apocalyptic number.

111012220221210 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 111012220221210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180130539318912).

111012220221210 is an abundant number, since it is smaller than the sum of its proper divisors (249248858416614).

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

111012220221210 is a wasteful number, since it uses less digits than its factorization.

111012220221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18183749 (or 18183746 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 111012220221210 its reverse (12122022210111), we get a palindrome (123134242431321).

The spelling of 111012220221210 in words is "one hundred eleven trillion, twelve billion, two hundred twenty million, two hundred twenty-one thousand, two hundred ten".